Path of Men's Testosterone Cheat Sheet
TESTOSTERONE CHEAT SHEET Boron - 6-10 mg/day L-carnitine - 2 g/day Zinc - 15 mg/day Copper - 1-2 mg/day Manganese - 1-2 mg/day Selenium - 200 mcg/day Magnesium - 100 mg/day Vitamin D3 - 4,000 IU/day Vitamin K2 - 200mcg/day
A multivitamin wearing a testosterone t-shirt. Most of these compounds (zinc, magnesium, D3, selenium) only raise T in men who start deficient, and there's no bloodwork on the cheat sheet. Magnesium at 100 mg is well below the 200–400 mg used in any T-relevant trial, and the actual top-three levers for T — sleep, body fat, training — don't appear at all.
| Goal | Score | Grade | Weight | Why |
|---|---|---|---|---|
| Longevity | 78 | C+ | 25% | Vitamin D3 4,000 IU + K2 200 mcg is a real longevity pairing; selenium and trace minerals support healthspan in deficient men. Nothing exotic, nothing wrong. |
| Cognition | 68 | D+ | 15% | D3, zinc, and magnesium have minor cognitive effects mostly via deficiency correction. Magnesium at 100 mg is too low to do the cognitive work it could. |
| Sleep & recovery | 60 | D- | 10% | Magnesium is the only sleep-relevant compound, and 100 mg is roughly a quarter of the 300–400 mg used in sleep trials. Sub-therapeutic for the goal. |
| Energy & metabolism | 75 | C | 50% | L-carnitine at 2 g and D3 at 4,000 IU are real metabolic interventions. The T-axis effects across the stack land here — energy, libido, fat metabolism — assuming you start deficient. |
| Body recomposition | — | Not targeted | — | Not targeted: no anabolic agent, no resistance training, no protein target. Vitamin-mediated T boosts in deficient men aren't a body-recomp mechanism. |
Ingredients (9)
Boron
- Dose
- 6-10 mg/day
- Mechanism
- Modestly raises free testosterone by reducing SHBG-bound T and free estradiol; some evidence for increased free vitamin D and reduced inflammatory markers.
- Take
- 6–10 mg/day matches the dose used in the small human trials that show free-T increases (6–10 mg over 1–8 weeks). Sane dose for an effect that's real but small — expect single-digit-percent free-T shifts in non-deficient men, not a transformation.
L-carnitine
- Dose
- 2 g/day
- Mechanism
- Shuttles long-chain fatty acids into the mitochondrial matrix for beta-oxidation; some data on increased androgen receptor density in skeletal muscle following loading protocols.
- Take
- 2 g/day is the dose used in most human trials. Real metabolic effect, but the most consistent T-axis finding is sperm quality and fertility benefit, not serum testosterone elevation. Honest framing is 'AR sensitivity' not 'T-boost.'
Zinc
- Dose
- 15 mg/day
- Mechanism
- Cofactor in testosterone synthesis and aromatase regulation; severe zinc deficiency suppresses T, and repletion restores it.
- Take
- 15 mg/day matches the RDA. Fine for adequacy, but the T-boosting evidence for zinc is essentially restricted to deficient men. In replete men you're maintaining, not boosting — and most varied diets already provide this much.
Copper
- Dose
- 1-2 mg/day
- Mechanism
- Cofactor for cytochrome c oxidase and several other enzymes; chronic zinc supplementation depletes copper, so co-supplementation prevents iatrogenic deficiency.
- Take
- Sensible inclusion alongside zinc, matching the RDA. No direct testosterone role — this is multivitamin adequacy reframed as endocrine optimization.
Manganese
- Dose
- 1-2 mg/day
- Mechanism
- Trace cofactor for SOD2 (mitochondrial superoxide dismutase) and enzymes in bone and connective tissue formation.
- Take
- Multivitamin filler in a T-stack. RDA is ~2.3 mg/day and most varied diets exceed it. No published evidence that supplementing manganese in adequate men moves testosterone in any direction.
Selenium
- Dose
- 200 mcg/day
- Mechanism
- Cofactor for selenoproteins involved in thyroid hormone activation and antioxidant defense; concentrated in testicular tissue, with some evidence for sperm and Leydig cell function.
- Take
- 200 mcg/day is below the 400 mcg UL but firmly in the upper half of the safe range. Reasonable, but stacking with a Brazil-nut-heavy diet (one nut can hold 60–90 mcg) pushes toward selenosis over months. Track total intake.
Magnesium
- Dose
- 100 mg/day
- Mechanism
- Cofactor for >300 enzymes including those in T synthesis and SHBG-T binding; modulates GABAergic tone and supports sleep architecture and HRV.
- Take
- Sub-therapeutic. RDA for adult men is 400–420 mg, typical Western intake runs ~100–200 mg short, and the trials showing T or sleep benefit dose at 200–500 mg/day. 100 mg covers maybe a quarter of the typical shortfall — not enough to move serum T, sleep depth, or HRV meaningfully.
Vitamin D3
- Dose
- 4,000 IU/day
- Mechanism
- Steroid hormone with receptors throughout the body including Leydig cells; correcting deficiency normalizes T synthesis. Broad longevity, immune, and bone effects independent of the T axis.
- Take
- 4,000 IU/day is the practical sweet spot — well below the 10,000 IU/day NOAEL, enough to bring most adults to 25(OH)D in the 40–60 ng/mL range. The T-axis effect is real but limited to men starting deficient; replete men get nothing for T but still get the broader benefits.
Vitamin K2
- Dose
- 200 mcg/day
- Mechanism
- Activates osteocalcin and matrix Gla protein, directing calcium toward bone and away from arterial walls; pairs with high-dose D3 to mitigate vascular calcification risk.
- Take
- 200 mcg/day (presumably MK-7) is reasonable and pairs well with the D3 dose. No direct testosterone role — this is bone and arterial insurance, which is fine, but it doesn't belong on a 'testosterone cheat sheet' under honest framing.
Risks & interactions
- Multivitamin marketed as endocrine optimizationmedium
The 'cheat sheet' framing implies these compounds raise testosterone in any man taking them. The literature is much narrower: zinc, magnesium, vitamin D, and selenium move T meaningfully only in men starting from deficiency. Without bloodwork, you can't know which deficiencies you have. The opportunity cost is real — a man with low T from poor sleep, high body fat, or untreated primary hypogonadism will spend months on supplements while the actual cause goes unaddressed.
- Sub-therapeutic magnesiumlow
100 mg/day is well below the 200–500 mg dosing in any trial showing magnesium-related testosterone, sleep, or HRV benefit. If magnesium is in the stack at all, it's worth dosing it to a level that actually does something (300–400 mg of glycinate or threonate).
- Selenium accumulation risk with dietary stackinglow
200 mcg/day is below the 400 mcg UL but high enough that stacking with selenium-rich foods (especially Brazil nuts, which can carry 60–90 mcg per nut) pushes total intake toward the selenosis threshold over months. Track dietary selenium if running this long-term.
The largest non-pharmaceutical T lever isn't on this list. Three sets of compound lifts — squat, deadlift, press, row — three times a week will move free testosterone, body composition, and SHBG more than the entire supplement column combined, and it's free. The 'cheat sheet' framing implies a shortcut around the work; the actual shortcut is the work.
Estimated cost
Retail supplement pricing for nine commodity vitamins/minerals bought separately. Buying a quality men's multivitamin covers most of this list for $25–40/mo, which is what the stack effectively is.