Supplements for men
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Here is a practical, evidence-based guide to supplements for men, organized by category:
Supplements for Men: Evidence-Based Guide
Tier 1 - Strong Evidence
Vitamin D
Most men in the modern world are deficient, especially those with indoor jobs. Vitamin D supports testosterone production, immune function, bone density, and mood. Low levels are linked to hypogonadism (low testosterone). A typical dose is 1,000-2,000 IU/day; get blood levels tested first if possible.
Omega-3 Fatty Acids (EPA + DHA)
Heart disease is the top killer of men. Omega-3s reduce triglycerides, lower inflammation, and support brain health. Best from fatty fish; supplementing with 1-3 g/day of combined EPA/DHA is practical if dietary intake is low.
Creatine Monohydrate
This is the most well-studied performance supplement available. A 2023 systematic review and meta-analysis (PMID: 34859731) confirmed benefits for aerobic capacity alongside well-established gains in strength and muscle mass. Also has growing evidence for cognitive benefits, especially in older men. 3-5 g/day is the standard dose.
Magnesium
A large percentage of men are deficient in magnesium, which is involved in over 300 enzymatic reactions. Benefits include better sleep quality, muscle function, stress regulation, and reduced risk of type 2 diabetes. Magnesium glycinate or malate are gentler forms than oxide.
Tier 2 - Good Evidence, Context-Dependent
Zinc
Important for testosterone production, sperm quality, immune defense, and wound healing. Deficiency is common in men who sweat heavily (athletes) or eat low meat diets. Do not exceed 40 mg/day - excess zinc depletes copper.
B Vitamins (especially B12, B6, Folate)
Energy metabolism, red blood cell production, and nerve function. B12 deficiency is particularly common in men over 50 and in those taking metformin or eating vegan/vegetarian. B vitamins are water-soluble, so excess is generally excreted.
Fiber (Psyllium Husk)
Consistently shown to improve cholesterol, blood sugar regulation, and gut health. Most men get less than half the recommended 38 g/day. Psyllium is a convenient supplement form.
Protein Powder (Whey or Plant-Based)
Not strictly a supplement but a food - useful for hitting protein targets, especially for active men or those over 40 where muscle preservation matters more. 1.6-2.2 g/kg body weight is the evidence-based range for muscle maintenance/growth.
Tier 3 - Emerging or Targeted Evidence
Ashwagandha (KSM-66 or Sensoril)
Adaptogen with decent RCT data showing reductions in cortisol, improvements in testosterone (modestly), better sleep, and enhanced recovery from exercise. Worth considering for men with high stress loads.
Lycopene
A 2025 systematic review (PMID: 40806357) found positive associations between lycopene intake and male reproductive health. Also has prostate health implications. Found in tomatoes; supplement if intake is low.
Nutraceuticals for Erectile Function
A 2024 network meta-analysis (PMID: 39279185) reviewed supplements for erectile dysfunction and found some evidence for certain nutraceuticals (including L-arginine, propionyl-L-carnitine combinations), though effect sizes are modest compared to medications.
Saw Palmetto
Commonly used for benign prostatic hyperplasia (BPH) symptoms - frequent urination, weak stream. Evidence is mixed; some studies show modest benefit for symptom relief, others do not. Generally safe to try.
Vitamin K2 (MK-7 form)
Works synergistically with Vitamin D to direct calcium into bones rather than arteries. If you supplement with higher-dose Vitamin D, pairing with K2 (100-200 mcg/day) makes sense.
Nutritional Support for Male Fertility
A 2023 systematic review and network meta-analysis (PMID: 36943634) found that several nutritional therapies improved outcomes in male infertility - antioxidants (vitamin C, E, CoQ10), zinc, selenium, and folate showed the most evidence.
By Age / Goal
| Goal | Top Picks |
|---|---|
| Muscle building | Creatine, protein, zinc, vitamin D |
| Heart health | Omega-3, fiber, magnesium, CoQ10 |
| Testosterone support | Vitamin D, zinc, ashwagandha, magnesium |
| Fertility | Zinc, CoQ10, vitamin C/E, selenium, folate |
| Over 50 | Multivitamin, B12, vitamin D + K2, omega-3, creatine |
| High stress | Ashwagandha, magnesium glycinate, B vitamins |
What to Skip (or Approach With Skepticism)
- Testosterone booster blends - most are marketing-driven with little clinical support beyond what individual ingredients (zinc, vitamin D) already provide
- Fat burners - stimulant-heavy with poor safety profiles
- Most proprietary blends - underdosed key ingredients hidden behind "proprietary matrix" labels
- Collagen peptides for muscle - useful for joints and skin, but not a substitute for complete protein sources
Practical Notes
- Look for third-party tested products (NSF Certified for Sport, USP, or Informed Sport)
- Whole foods first - supplements fill gaps, they don't replace a poor diet
- Check with a doctor if you take any medications, since several supplements interact with common drugs (omega-3 + blood thinners, for example)
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