Top 5 — Ranked by Evidence
Very Strong
Folate
Aids in Fertility
400 mcg/day DFE (RDA); pregnancy: 600 mcg/day; methylfolate (5-MTHF): 400–800 mcg/day
Strong
Acetyl-L-Carnitine (ALCAR)
Male fertility improvement
COGNITIVE/AGING: 1500-3000 mg/day divided. DIABETIC NEUROPATHY: 1000 mg × 3/day = 300
Strong
Ashwagandha
Male Fertility and Testosterone
KSM-66® root extract: 300-600 mg/day (most stress/sleep trials). Shoden®: 120-240 mg/
📈 Fastest Growing Fertility Ingredients
Branded ingredients seeing rapid growth in formulator adoption and clinical research in 2024–2026.
Trending
Moderate
Kaneka Ubiquinol™ (Reduced Coenzyme Q10)
Fertility support
Typically 100 to 200 mg per day.
Trending
Moderate
PrimaVie® (Shilajit Extract — Natreon)
Sperm count and male fertility
250 mg twice daily (500 mg/day); CoQ10-potentiation studies 200 mg/day.
Trending
Very Strong
Folate
Aids in Fertility
400 mcg/day DFE (RDA); pregnancy: 600 mcg/day; methylfolate (5-MTHF): 400–800 mcg/day…
🔬 Future Fertility Ingredients to Watch
Lower current evidence but active research underway — these may become top picks within 2–3 years.
Watch
Moderate
NAC (N-Acetylcysteine)
Fertility Benefits
600–1,800 mg/day in divided doses; 600 mg twice daily; 600 mg three times daily.
Watch
Moderate
Shatavari (Asparagus racemosus / Xeya®)
Anovulatory infertility — preliminary ovulation-induction signal
500-1,000 mg/day standardized root extract. Lactation: 300 mg twice daily. PCOS (CL22209): 100…
Watch
Moderate
L-Carnitine
Male fertility — sperm count and motility
General 1-3 g/day; recovery 2 g/day L-carnitine L-tartrate; cognitive 1-2 g/day…
Recommended Fertility Products
Heads up: NutraSmarts may earn a commission from purchases made through these links, at no extra cost to you. We curate these picks based on the same evidence we cite throughout the page. Full disclosure.
Real products featuring the best-evidenced fertility ingredients ranked above - chosen for clinically-studied forms and doses, third-party testing, and value. Match the supplement to your specific need.
Best for preconception foundational nutrients
Amazon →
Garden of Life mykind Organics Prenatal Multi
Whole-food multi w/ methylfolate + D3, 90 tablets
Organic whole-food prenatal supplying folate (not folic acid), iron and D3; certified organic, non-GMO, vegan.
Best for the absorbable ubiquinol form
Amazon →
Life Extension Super Ubiquinol CoQ10
100 mg ubiquinol softgels, 60 ct
Provides the reduced ubiquinol form of CoQ10 that is often easier to absorb, from a tested, well-formulated brand.
Best for reproductive-health zinc support
Amazon →
Thorne Zinc Picolinate 30 mg
30 mg zinc picolinate capsules, 60 ct
Well-absorbed picolinate form supporting normal reproductive health; third-party certified, free of gluten/dairy/soy.
Best for antioxidant & glutathione support
Amazon →
NOW Supplements NAC 600 mg
600 mg w/ selenium & molybdenum veg caps, 100 ct
NAC is a precursor the body uses to make glutathione; adds selenium and molybdenum from a value-priced brand.
All Fertility Ingredients (14)
Very Strong
Folate
Aids in Fertility
400 mcg/day DFE (RDA); pregnancy: 600 mcg/day; methylfolate (5-MTHF): 400–800 mcg/day
Strong
Acetyl-L-Carnitine (ALCAR)
Male fertility improvement
COGNITIVE/AGING: 1500-3000 mg/day divided. DIABETIC NEUROPATHY: 1000 mg × 3/day = 300
Strong
Ashwagandha
Male Fertility and Testosterone
KSM-66® root extract: 300-600 mg/day (most stress/sleep trials). Shoden®: 120-240 mg/
Moderate
Kaneka Ubiquinol™ (Reduced Coenzyme Q10)
Fertility support
Typically 100 to 200 mg per day.
Moderate
PrimaVie® (Shilajit Extract — Natreon)
Sperm count and male fertility
Clinical trial dose: 250 mg twice daily (500 mg/day total) for 90 days. CoQ10 potenti
Moderate
L-Carnitine
Male fertility — sperm count and motility
General supplementation: 1-3 g/day L-carnitine. Athletic recovery: 2 g/day L-carnitin
Moderate
NAC (N-Acetylcysteine)
Fertility Benefits
600–1,800 mg/day in divided doses; respiratory: 600 mg twice daily; liver support: 60
Moderate
Tongkat Ali
No fertility evidence on this page
Standard dose: 100-400 mg/day standardized root extract. Most clinical trials use 200
Limited
Safed Musli (Chlorophytum borivilianum)
Modest semen parameter improvements (small Ayurvedic clinical trials)
TRADITIONAL AYURVEDIC: 5-10 g root powder/day with milk. CAPSULE EXTRACTS: 250-500 mg
Limited
Royal Jelly
Fertility: no human trial evidence for oral royal jelly
1,000 mg/day of royal jelly capsules for 8 weeks in menopausal and PMS trials; other trials used 800 to about 3,150 mg/day; no trial on this page used 500 mg/day.
Moderate
Shatavari (Asparagus racemosus / Xeya®)
Anovulatory infertility — preliminary ovulation-induction signal
500-1,000 mg/day standardized root extract. Lactation: 300 mg twice daily. PCOS (CL22
Limited
Maca
Semen Parameters: One Small Uncontrolled Study
1.5–3 g/day dried root powder; raw, gelatinised, yellow, red and black preparations are not interchangeable.
Strong
Zinc
Immune System Support
8 to 11 mg/day elemental zinc is the adult RDA; supplements provide 15 to 30 mg/day. The upper limit is 40 mg/day; doses above it, like the 50 mg/day used in trials, need medical guidance.
Limited
Shilajit
Testosterone increase in middle-aged men
Standard clinical dose: 250 mg twice daily (500 mg/day total) of purified shilajit st