Essential Supplements — The Daily Ten for Men and for Women
Essential Supplements — The Daily Ten for Men and for Women
Sub-article of Supplementation — Wheel of Health. See also: Blood Tests, Foods and Substances to Avoid, Bone and Joint Health, Heart Health, Monitor.
Ten supplements earn a daily place for most adults living an indoor, industrial life, and men and women share eight of them. Both take vitamin D3 with K2, magnesium, omega-3 fats, creatine, protein to close the food gap, an iron-free multivitamin, electrolytes when sweat or fasting drains them, and vitamin C at a dose set by sex. Men add zinc with copper and, last and on weaker ground, boron. Women add iron when ferritin calls for it and collagen taken before training. The two lists part where the body parts: women lose iron every month, men lose zinc in semen and form oxalate stones from high-dose ascorbate, and a woman’s skeleton loses its estrogen brake at menopause.
Every item below arrives with three things attached: why it earns its rank, how much, and the marker that tells you whether you need it at all. A ranking of this kind is a starting estimate. Your own panel, drawn as Blood Tests describes, replaces the estimate with a measurement, and the measurement wins every time they disagree.
1. What Earns a Daily Place
Four questions decide the order, and an item has to answer all four.
How many people fall short? Magnesium and vitamin D rank high because the shortfall is common across whole populations, so the prior that you are short is high before any test is drawn. Boron ranks last partly because nobody has shown that a shortfall exists.
Does taking it change an outcome? A change in a lab value does not count. Blood Tests calls this the actionability filter, and it is where most of the supplement aisle fails. Creatine passes on lean mass in randomized trials. Collagen for skin fails once the industry-funded trials are set aside.
What does it cost the body when it goes wrong? Every dose has a safety file. Vitamin K2 against warfarin, omega-3 above a gram and atrial fibrillation, ascorbate and kidney stones in men, iron in a body that already has enough. A supplement with a heavy file earns its place only where the need is measured.
What does it cost to keep taking? Money, and pill count. Seven bottles that a person stops taking in March do less than four that are still being taken in December. A multivitamin ranks sixth for exactly this reason: it carries five or six of the smaller items in one tablet.
One trial governs how the whole list should be read. VITAL gave 25,871 American adults 2,000 IU of vitamin D3 daily for a median 5.3 years. Fractures did not fall (LeBoff, NEJM, 2022), cancer and cardiovascular events did not fall, and yet confirmed autoimmune disease fell by 22%, a hazard ratio of 0.78 (95% CI 0.61–0.99) (Hahn, BMJ, 2022). Most participants started with adequate blood levels. A nutrient given to people who already have enough does little, and the same nutrient given to people who lack it can matter a great deal. So the rank tells you where to start, and the marker tells you whether to continue.
Supplements sit on a foundation they cannot replace. Foods and Substances to Avoid makes the prior case: removing seed oils, sugar, alcohol and white flour does more than adding ten pills. And the ten below are the nutritional floor only. The tonic herbs that build vitality across years, reishi, cordyceps, the Jing tonics, belong to another category with another logic, held in the tonic-herbalism sections of Supplementation.
2. The Two Lists
| Rank | Men | Women |
|---|---|---|
| 1 | Vitamin D3 with K2 | Vitamin D3 with K2 |
| 2 | Magnesium bisglycinate | Magnesium bisglycinate |
| 3 | Omega-3, EPA and DHA | Omega-3, EPA and DHA |
| 4 | Creatine monohydrate | Creatine monohydrate |
| 5 | Protein, to close the food gap | Protein, to close the food gap |
| 6 | Multivitamin, iron-free | Multivitamin, iron-free, with methylfolate |
| 7 | Electrolytes, when sweat or fasting drain them | Electrolytes, when sweat or fasting drain them |
| 8 | Vitamin C, whole-food, kept low | Vitamin C, up to a gram |
| 9 | Zinc with copper | Iron, only when ferritin is low |
| 10 | Boron, unevidenced | Collagen with vitamin C, before loading |
Ranks one to six are daily for nearly every adult. From seven down, each item holds where its condition holds: a sweating or fasting body, a body short of iron, a training program for collagen to serve.
Sex enters through three pieces of physiology, and nowhere else. Women of reproductive age lose blood monthly, which is why the recommended daily iron intake is 18 mg for a woman between nineteen and fifty against 8 mg for a man. Men lose zinc in semen, about 0.41 mg per ejaculate at ordinary intake, as Curtiss Hunt’s group measured in 1992. And men form calcium oxalate stones from high-dose ascorbate where women, in the largest cohorts, do not.
Chinese medicine reads the same two losses in its own terms. A woman’s monthly loss drains blood, and the classical remedy for blood deficiency is a tonic; a man’s seminal loss drains essence, the Jing that the Daoist conservation practices exist to protect. Those are tradition claims about the energetic register. The iron and the zinc are the part of each loss that a laboratory can weigh, and the two registers describe one body.
3. The Shared Eight, in Rank Order
1. Vitamin D3 with K2
Vitamin D comes from sunlight on skin, and indoor work, northern latitude, sunscreen, darker skin and age all cut production. Deficiency is common enough that Blood Tests places 25-hydroxyvitamin D in its screening tier. VITAL is the case for correcting a real deficiency and the case against loading a replete body. The D-Health trial gave 21,315 Australians aged 60 to 84 a monthly 60,000 IU for five years and found no fall in deaths.
The Endocrine Society’s 2024 guideline goes further than the trials and advises healthy adults aged 19 to 74 against both routine testing and supplements above the dietary reference intake. Harmonism departs from it on testing. The trials that returned null results enrolled mostly replete people, and the only way to know which group you belong to is to measure. Harmonism holds a blood level of 50 to 80 ng/mL as the working range set at Supplementation; no trial has established that range against hard outcomes, and it is marked here as the system’s position rather than as trial evidence.
Take: 2,000 IU of D3 daily as the default, up to the 4,000 IU tolerable upper intake, with a fat-containing meal. Above that, dose against a measured level. K2 as MK-7, 90 to 180 µg.
Why K2 rides along: K2 activates the proteins that direct calcium into bone matrix and keep it out of artery walls. The outcome evidence is thin and growing. VitaK-CAC randomized 180 people with mild coronary calcification to 360 µg of MK-7 or placebo for two years; calcium scores rose to a median 184 against 214 Agatston units (JAMA Cardiology, June 2026). That result moves a scan, which is a surrogate, and no trial yet links it to fewer heart attacks. Bone and Joint Health holds K2 for calcium direction, not for density.
Marker: 25-hydroxyvitamin D with parathyroid hormone, before starting and at twelve weeks. At high doses, 24-hour urinary calcium, because hypercalciuria arrives before serum calcium moves.
Watch: K2 directly antagonizes warfarin and is added only with the prescriber and INR monitoring. Vitamin D is contraindicated in sarcoidosis and other granulomatous disease, and alongside thiazide diuretics.
2. Magnesium
Nearly half of Americans take in less magnesium from food than the estimated average requirement for their age and sex. Magnesium runs the enzymes of energy production, nerve conduction, rhythm and bone mineralization, and processed food strips it out.
The trials for single outcomes are modest. A 2021 meta-analysis covering 151 older adults with insomnia found sleep onset about 17 minutes faster and total sleep about 16 minutes longer, and its authors graded the evidence low to very low. Heart Health notes that no large outcome trial has yet tested magnesium against cardiac events. It ranks second anyway, because the shortfall is common, the dose is cheap, and the safety file is short.
Take: 200 to 400 mg of elemental magnesium as bisglycinate in the evening. Glycinate is gentle on the gut; oxide is cheap, poorly absorbed and laxative. Split the dose if stools loosen.
Marker: Serum magnesium is close to useless, because the body holds it steady by drawing on bone and cells. Red-cell magnesium is better and less standardized. As Blood Tests puts it, a trial of the supplement tells you more than the test: sleep, cramps, bowel habit and resting heart rhythm over four weeks.
Watch: Impaired kidneys cannot clear magnesium, so check kidney function before dosing. Separate it by two hours from tetracycline and quinolone antibiotics, bisphosphonates and levothyroxine.
3. Omega-3 Fats
Most people eating a Western diet carry a red-cell omega-3 index around 4 to 5%, against the 8% that the cohort data associate with the lowest cardiovascular mortality. EPA and DHA build cell membranes in the brain and retina and feed the compounds that resolve inflammation.
The outcome trials divide by dose and form, and Heart Health tiers them in full. One gram daily did nothing for heart attack or stroke in VITAL. Purified EPA at four grams cut major cardiac events by 25% in REDUCE-IT, though its mineral-oil placebo raised LDL and inflammatory markers in the control arm and left the true effect size uncertain. Across seven trials and 81,210 participants, Gencer and colleagues found atrial fibrillation rising with dose, more steeply above a gram a day (Circulation, 2021). A 2013 cohort finding linking high blood omega-3 to prostate cancer did not survive a meta-analysis of 21 studies and more than 460,000 men.
One finding from the brain gives the index unusual weight. In the VITACOG trial, B vitamins slowed brain atrophy by 40% in older adults with high omega-3 status and did nothing in those with low status. Omega-3 sufficiency may decide whether other nutrients work.
Take: Fish first: sardines, mackerel, anchovies or wild salmon two or three times a week. Supplement to fill the gap, about one gram of combined EPA and DHA in triglyceride form with a meal, raised only as far as the index requires. Freshness matters, because oxidized oil is worse than none, so buy third-party tested oil and keep it cold.
Marker: Omega-3 index, at baseline and twelve weeks after any change.
Watch: Gram doses add to the bleeding risk of anticoagulants and antiplatelet drugs. Anyone with atrial fibrillation or its risk factors stays at or below a gram.
4. Creatine Monohydrate
Creatine recycles ATP in muscle and brain, and the body makes about half of what it uses while diet supplies the rest, almost entirely from meat and fish. Supplementing raises muscle stores by roughly a fifth to a third, more in people who eat little meat.
The evidence is among the strongest in the field. Darren Candow’s group and others have tested it in older adults for two decades. DeVries and Phillips pooled twelve randomized trials and 357 older adults and found about 1.1 kg more lean mass with resistance training than training alone, with greater gains in chest press, leg press and the chair-stand test (Medicine & Science in Sports & Exercise, 2014). Candow’s two-year trial in 237 postmenopausal women found no effect on bone mineral density and a preserved femoral-neck section modulus, a predictor of bending strength, with more lean tissue among completers (2023). Creatine supports a loading program and replaces none of it.
Women have more to gain. A 2025 review estimates their creatine synthesis about 20% lower than men’s and their dietary intake 30 to 40% lower (review). The same review states plainly that no trial has yet tested creatine in perimenopausal women, so the claims made for that window are reasoned from mechanism and remain open.
Hair loss worries many men, and the worry traces to one paper. Van der Merwe and colleagues gave creatine to 20 South African rugby players in 2009 and measured dihydrotestosterone 56% above baseline after the loading week; nobody looked at their hair. In 2025 Ashtary-Larky, Antonio, Forbes and colleagues gave 45 men 5 g daily for twelve weeks and measured DHT, the DHT-to-testosterone ratio, hair density and follicle health directly. None differed from placebo (JISSN, 2025).
Take: 3 to 5 g daily, any time of day, every day. No loading phase is needed; stores saturate within about four weeks without one.
Marker: Creatine raises serum creatinine without harming the kidney, and a creatinine-based filtration estimate then reports kidney damage that is not there. Use cystatin C, as Blood Tests advises for anyone with substantial muscle mass.
Watch: Existing kidney disease means a conversation with the clinician first.
5. Protein, to Close the Food Gap
Protein powder is food, and it earns a rank because most adults past forty eat less protein than muscle and bone can use. Morton and colleagues pooled 49 randomized trials and 1,863 resistance-training adults and found gains in fat-free mass and strength plateauing near 1.6 g per kilogram of bodyweight per day, with older participants needing more to get the same effect (British Journal of Sports Medicine, 2018). Bone and Joint Health sets the target at 1.2 to 1.6 g/kg because bone matrix is a third protein by mass.
A 70 kg woman at 1.4 g/kg needs about 100 g a day. A breakfast of two eggs and toast supplies about 15.
Take: Only the gap between what your food supplies and your target. Whey isolate, which carries little lactose, or a pea-and-rice blend for those who avoid dairy, in 25 to 40 g servings, often at the meal that runs shortest, usually breakfast. Choose powders tested for heavy metals, a particular concern for plant proteins.
Marker: A week of honest food logging tells you the gap. Lean mass on a DEXA scan, yearly, tells you whether closing it worked.
Watch: Advanced kidney disease changes the target, and the clinician sets it.
6. A Multivitamin, as the Consolidator
A multivitamin will not lengthen your life. Erikka Loftfield’s analysis of three American cohorts followed 390,124 healthy adults for more than twenty years and found no lower risk of death among daily users (National Cancer Institute, 2024). The randomized trials found smaller things. In the Physicians’ Health Study II, 14,641 male doctors on a daily multivitamin had 8% fewer cancers over eleven years. Across the three COSMOS cognition trials, about 5,000 older adults on a daily multivitamin showed memory decline slowed by roughly two years against placebo (COSMOS, 2024).
It ranks sixth for a practical reason. One tablet carries B12, folate, selenium, iodine and zinc at maintenance doses, and often boron, which would otherwise mean five bottles. Fewer bottles means the regimen survives.
What to look for, without brands:
- Iron-free for men and for women after menopause. Iron is pro-oxidant, and Supplementation refuses it without a measured need. Menstruating women decide iron separately by ferritin (rank nine).
- B12 as methylcobalamin, and folate as methylfolate.
- B6 at or below 25 mg, since sustained intake near 50 mg and above causes sensory neuropathy and many high-potency formulas exceed it.
- No high-dose beta-carotene for smokers or former smokers. In the ATBC and CARET trials it raised lung cancer.
- Third-party tested, with doses on the label rather than hidden in a proprietary blend.
B12 on its own: Some people need more than a multivitamin delivers: a plant-based diet, metformin, long-term acid suppression, or age past sixty. In Lam and colleagues’ Kaiser Permanente study of 25,956 people diagnosed with B12 deficiency, 12.0% had taken proton-pump inhibitors for two years or more, against 7.2% of 184,199 controls (JAMA, 2013). For these people, 500 to 1,000 µg of methylcobalamin daily.
Folate, with the seam marked: For a woman who could conceive, folate is the main reason to take a multivitamin at all, since the neural tube closes before most women know they are pregnant. Folic acid is the form with the randomized evidence: the 1991 Medical Research Council trial cut neural-tube defects by about 70%. Methylfolate raises blood folate comparably and bypasses the MTHFR step, and Harmonism prefers it, but no trial has tested it against neural-tube defects. That preference is the system’s reasoning from mechanism, and the trial-proven form is folic acid. Pregnancy itself belongs to a dedicated protocol, not to this list.
Marker: B12 with methylmalonic acid, and folate, on the annual panel. Biotin, common in multivitamins, interferes with many immunoassays; hold it for three days before any blood draw.
7. Electrolytes, When Sweat or Fasting Drains Them
Sweat carries sodium out of the body at rates that vary fourfold between people. Lindsay Baker’s review of athletes found sweat sodium running from about 20 to 80 mmol per litre, roughly 460 to 1,840 mg, at sweat rates from 0.3 to 2.6 litres an hour (Baker, Sports Medicine, 2017). A heavy sweater training for ninety minutes in heat can lose several grams of sodium. Fasting and carbohydrate restriction drain it too, because falling insulin lets the kidneys release sodium and water, which is the mechanism behind the headache and fatigue of the first fasting days.
This item is conditional. A sedentary person eating ordinary food takes in plenty of sodium. Electrolytes earn a daily place for the person who sweats hard, fasts, eats low-carbohydrate, or drinks highly purified water.
Take: Sodium from unrefined salt, 500 to 1,000 mg per litre of sweat lost, in water during and after training and on fasting days. Potassium mostly from food: potatoes, beans, leafy greens, avocado. Magnesium is already covered at rank two. Hydration holds the water itself.
Marker: Home blood pressure across a week, which Blood Tests ranks above most of any panel, and the sodium and potassium on a standard metabolic panel. Cramps, headache on fasting days, and dizziness on standing are the felt signals.
Watch: Salt-sensitive hypertension, heart failure and kidney disease all change this item. Potassium supplements are dangerous alongside ACE inhibitors, angiotensin-receptor blockers and potassium-sparing diuretics, which raise blood potassium on their own.
8. Vitamin C, Dosed by Sex
Vitamin C builds collagen, recycles other antioxidants and supports immune cells, and the body cannot make it. Its best randomized evidence is narrow. Hemilä and Chalker’s Cochrane review of 29 trials and 11,306 participants found that regular supplementation of 200 mg or more left the incidence of colds unchanged in ordinary people, halved it in people under extreme physical stress such as marathon runners and soldiers in arctic training (five trials, 598 participants), and shortened colds in adults by 8% (Cochrane).
The dose divides by sex because of kidney stones. Some ascorbate is converted to oxalate in the body, and the conversion grows with dose: two grams a day raised urinary oxalate by 20% in healthy people and 33% in stone formers in a controlled crossover study. In the Swedish cohort followed by Laura Thomas and colleagues, 23,355 men tracked for eleven years, those taking vitamin C supplements, typically 1,000 mg tablets, formed kidney stones about twice as often; men on multivitamins, with their lower dose, showed no increase (Karolinska Institutet, 2013). Pietro Ferraro and colleagues then followed 156,735 women and 40,536 men in the Nurses’ Health and Health Professionals cohorts. In men, total vitamin C intake of 1,000 mg or more raised stone risk by 43% (HR 1.43, 95% CI 1.15–1.79) and 500 to 999 mg by 29%. Vitamin C from food showed no association in either sex, and in women no intake level raised risk (American Journal of Kidney Diseases, 2016). A 2023 meta-analysis of four studies put the excess in men at an odds ratio of 1.62 and found none in women.
Natural sources, acerola, camu camu and amla, carry the same molecule. The Linus Pauling Institute summarizes the chemistry plainly: natural and synthetic L-ascorbic acid are chemically identical, and ten clinical comparisons found no meaningful difference in absorption between vitamin C alone and vitamin C in flavonoid-rich foods (Linus Pauling Institute). Oxalate forms from ascorbate whatever its source, in proportion to the dose. The reassuring food result in Ferraro’s cohorts reflects food intakes, mostly below 250 mg a day. A teaspoon of camu camu powder delivering 700 mg is a supplement dose that happens to come from a fruit, and no study has tested whether its matrix changes the stone risk. Ayurveda’s amla, carrying 193 to 720 mg per 100 g of fresh fruit and taken for centuries in the rasayana tradition, is a fine source at food quantities.
Take, men: Whole-food vitamin C from fruit or a fruit powder, total intake from all sources held near 250 mg. Ferraro’s data show risk rising significantly from 500 mg, and the 90 to 249 mg band already carried a non-significant 19%. A man with a stone history takes none beyond food.
Take, women: 250 to 1,000 mg daily, whole-food or ascorbate, with meals. A woman with a stone history follows the men’s rule.
One common pairing is unnecessary. Iron tablets are routinely taken with vitamin C to boost absorption. Li and colleagues randomized 440 adults with iron-deficiency anaemia, 96.8% of them women, to 100 mg of iron with or without 200 mg of vitamin C every eight hours for three months; haemoglobin and ferritin recovered identically (JAMA Network Open, 2020).
Watch: High-dose intravenous vitamin C causes haemolysis in G6PD deficiency. Vitamin C raises iron absorption from food, which matters for anyone with haemochromatosis.
4. Where the Lists Part
Men, 9. Zinc with Copper
Men need more zinc than women, 11 mg a day against 8, and lose it in a way women do not. Hunt’s 1992 depletion study at the US Department of Agriculture fed eleven young men a diet of 1.4 mg zinc a day. Their semen volume fell from 3.30 to 2.24 mL, zinc lost per ejaculate fell from 6.29 to 3.81 µmol, and serum testosterone fell from 26.9 to 21.9 nmol/L (American Journal of Clinical Nutrition, 1992). The study shows that deficiency lowers testosterone. It does not show that extra zinc raises testosterone in a man who already has enough, and no good trial has found that it does.
Zinc matters most where it runs short: a diet low in red meat and shellfish, a high-phytate plant diet, heavy sweating, frequent ejaculation, digestive disease. The Daoist practice of conserving semen to protect essence names, in the energetic register, the same loss that zinc measures in the physical one.
Take: Total zinc of 15 to 25 mg a day, counting what the multivitamin carries, as glycinate or picolinate. Copper at 1 to 2 mg alongside, keeping the ratio between about 8 and 15 to one. Stay under the 40 mg tolerable upper intake for long-term use. Chronic high-dose zinc blocks copper absorption and can cause anaemia and a copper-deficiency spinal cord disorder that walks like vitamin B12 deficiency.
Marker: Plasma zinc is distorted by inflammation, albumin and time of day (Blood Tests). Anyone supplementing zinc for months checks copper with ceruloplasmin once a year.
Women: The multivitamin’s maintenance dose covers most women. A standalone bottle earns its place only under the same conditions of low intake or high loss.
Men, 10. Boron, Unevidenced
Boron holds the last place on cost and safety, not on evidence. One human trial supports the claim made for men: Naghii and colleagues gave eight healthy men 10 mg daily for a week in 2011 and found free testosterone up, estradiol down and inflammatory markers lower. A longer, better-controlled trial in trained bodybuilders, Ferrando and Green’s seven weeks in 1993, found no effect. No randomized trial has tested boron against bone density or fracture (Bone and Joint Health). By the standard of the four questions, boron is unevidenced, which is a verdict and not an open question.
It stays on the list because Harmonist practice carries it, because 3 mg costs almost nothing and sits far below the 20 mg tolerable upper intake, and because many multivitamins already include it.
Take: 3 mg, preferably inside the multivitamin rather than as a separate bottle.
Marker: None that changes a decision.
Women, 9. Iron, Only When Ferritin Is Low
Iron deficiency is the most common nutritional deficiency in the world and the most frequently missed cause of fatigue in menstruating women. Angela Weyand and colleagues measured 3,490 American girls and young women aged 12 to 21 and found 38.6% iron deficient and 6.3% anaemic (JAMA, 2023). Many of them would have been told their ferritin was normal.
Iron is the one item on either list that nobody should take by default. It is pro-oxidant, the body has no route for excreting excess, and haemochromatosis loads it silently for decades. So the rule is to measure first, supplement to repletion, and stop.
Take, when ferritin and transferrin saturation show deficiency: 60 to 100 mg of elemental iron on alternate mornings. Every dose raises hepcidin, the hormone that shuts the gut against the next dose. Stoffel and colleagues gave 40 iron-depleted women 60 mg daily for fourteen days or on alternate days for twenty-eight; alternate-day dosing absorbed 21.8% against 16.3%, 175 mg in total against 131 (Lancet Haematology, 2017). Take it on an empty stomach with water, two hours away from coffee, tea, calcium, magnesium and zinc. Vitamin C is optional, as the trial at rank eight shows. A heavy period, a plant-based diet or endurance training raises the need; menopause ends it.
The Chinese pharmacopoeia treats women’s blood deficiency with donkey-hide gelatin, ejiao, usually alongside dong quai. In a 2021 randomized trial of 210 women with blood-deficiency symptoms, 6 g daily for eight weeks relieved dizziness, and haematocrit and red-cell count fell less than on placebo (Frontiers in Pharmacology, 2021). The trial is small and its haemoglobin effect unmeasured, and it places a classical tonic within reach of evidence.
Marker: Ferritin with transferrin saturation, never ferritin alone, since inflammation raises ferritin. Retest at three months, and stop when ferritin has recovered.
Watch: Levothyroxine and some antibiotics are separated from iron by four hours. Black stools are expected; abdominal pain is not.
Women, 10. Collagen with Vitamin C, Before Loading
Collagen’s reputation for skin rests on industry funding. Seung-Kwon Myung and Yunseo Park pooled 23 randomized trials and 1,474 participants in 2025 and found improvements in hydration, elasticity and wrinkles across the whole set, which vanished in the high-quality trials and in those without industry funding (American Journal of Medicine, 2025).
Bone and tendon are a different question. König and colleagues randomized 131 postmenopausal women to 5 g of specific collagen peptides or placebo for twelve months: spine density rose 3.0% against a 1.3% loss, and femoral neck density rose 6.7% against a 1.0% loss (Nutrients, 2018). It is one trial, the peptide’s manufacturer funded part of it, and it needs repeating. Shaw and colleagues showed the mechanism for connective tissue in 2017: 15 g of gelatin with vitamin C an hour before six minutes of rope-skipping doubled a blood marker of collagen synthesis in eight young men.
Collagen ranks last on the women’s list because the skin claim fails and the bone claim rests on one partly funded trial. It belongs there because bone loss accelerates sharply in the years after menopause, when estrogen stops restraining the cells that dissolve bone, and the heavy loading program at Bone and Joint Health is the intervention a woman in those years most needs.
Take: 10 to 15 g of collagen peptides or gelatin with about 50 mg of vitamin C, 30 to 60 minutes before a strength or impact session. On rest days it does little.
Marker: DEXA at twelve months on the same machine, alongside the loading program it supports.
Men: A man in a heavy loading program, or rehabilitating a tendon, can take collagen the same way. It does not make his ten because the case rests on bone loss that menopause makes urgent.
5. Taking Them
Ten items fit into five or six products, and two moments of the day.
Morning, with a meal containing fat: the multivitamin, D3 with K2, and the omega-3. All three are fat-soluble or partly so, and taking them together means one habit, not three.
One shake, after training or at breakfast: protein powder with creatine stirred in. Creatine’s timing barely matters; putting it in the shake makes it daily.
Before a loading session: collagen with vitamin C, for women in a strength program.
During and after sweat, and on fasting days: electrolytes in water.
Evening: magnesium.
Alternate mornings, alone: iron, for women who need it, two hours away from the multivitamin and magnesium.
Men’s daily stack, at its simplest: a multivitamin carrying zinc, copper and boron; D3 with K2; fish oil; a shake with creatine; magnesium at night. Five products, with vitamin C coming from fruit.
Women’s daily stack: a multivitamin with methylfolate; D3 with K2; fish oil; a shake with creatine; magnesium at night; vitamin C; iron and collagen where their conditions hold.
The interaction file in one place:
- Warfarin: K2 is a direct antagonist; omega-3 adds bleeding risk. Prescriber and INR first.
- Other anticoagulants and antiplatelet drugs: omega-3 at gram doses.
- Kidney disease: magnesium, creatine, protein targets and potassium all change.
- Thiazide diuretics and granulomatous disease: vitamin D.
- ACE inhibitors, angiotensin-receptor blockers, potassium-sparing diuretics: no potassium supplements.
- Levothyroxine: four hours from iron, calcium and magnesium.
- Tetracyclines and quinolones: two hours from magnesium, zinc and iron.
- Kidney-stone history: no vitamin C beyond food, either sex.
- Haemochromatosis: no iron, and no vitamin C with meals.
- G6PD deficiency: no high-dose intravenous vitamin C.
- Atrial fibrillation: omega-3 at or below a gram.
- Biotin: hold three days before blood tests.
- Pregnancy and breastfeeding: a separate protocol, with obstetric care.
6. How to Know It Is Working
Every item above carries a marker, and the markers fit on the annual panel that Blood Tests already specifies.
| Item | Marker | When |
|---|---|---|
| Vitamin D3 | 25-hydroxyvitamin D with PTH | Baseline, 12 weeks, then yearly |
| Magnesium | Red-cell magnesium; sleep, cramps, rhythm | Four-week trial, then yearly |
| Omega-3 | Omega-3 index | Baseline, 12 weeks, then yearly |
| Creatine | Cystatin C for kidney function | Yearly |
| Protein | Food log; DEXA lean mass | One week of logging; scan yearly |
| Multivitamin, B12 | B12 with methylmalonic acid; folate | Yearly |
| Electrolytes | Home blood pressure; sodium and potassium | Weekly at home; panel yearly |
| Zinc | Copper with ceruloplasmin | Yearly while supplementing |
| Iron | Ferritin with transferrin saturation | Baseline, 3 months, until replete |
| Collagen | DEXA, same machine | 12 months |
Retest at twelve weeks only what a change should have moved. A full panel repeated every three months mostly measures noise.
Each item also has a condition for stopping. Iron stops when ferritin recovers. Protein powder stops when meals close the gap. Fish oil shrinks when fish returns to the table twice a week. Vitamin D falls in a summer spent outdoors, and the level will show it. Supplementation names the aim of the whole practice as its own obsolescence: a diet, a sleep, a training life and a terrain good enough that the bottles become maintenance.
Emerson wrote in Compensation, in 1841, that “every excess causes a defect; every defect an excess.” Each dose above has a defect to repair and an excess to avoid, and the marker is how you know which side of the line you stand on. Monitor stands at the centre of the Wheel of Health for that reason. It is Presence turned on the body, the attention that notices fatigue before the ferritin result arrives and reads the result once it does. The body keeps its own order whether or not anyone measures it, and the order is Logos at the scale of iron, zinc and bone. Measuring is how a person comes into accord with it.
Take the ten that apply to you. Draw the markers. Stop what the markers say you no longer need.
See also: Supplementation, Super Immunity, Blood Tests, Monitor, Bone and Joint Health, Heart Health, Strength Training, Hydration, Nutrition, Foods and Substances to Avoid, Jing Qi Shen, Wheel of Health.