Shilajit (Fulvic Acid Complex) — Supplements
Himalayan mineral resin with 85+ trace minerals; fulvic acid component enhances CoQ10 and mitochondrial electron chain efficiency; two RCTs showing testosterone increase (~20%) and cognitive improvement.
Overview
Shilajit is a naturally occurring mineral resin exudate found primarily in the Himalayan and Hindu Kush mountain ranges, formed over millennia by microbial decomposition of plant material compressed under rock. It contains 85+ ionic minerals, fulvic acid (40-60% of dry weight), humic acid, dibenzo-α-pyrones (DBPs), and DBP-chromoproteins — a complex composition with multiple proposed biological activities. Two primary RCTs support its clinical use. A 2016 double-blind RCT (Pandit et al., Andrologia, n=96 healthy men, 90 days) found processed shilajit 250 mg twice daily significantly increased total testosterone (+20.45% vs baseline, p<0.001), free testosterone, and DHEA-S compared to placebo. A 2012 clinical study (Bhosale et al.) found shilajit supplementation improved measures of cognitive function in elderly subjects. Mechanistically, shilajit's fulvic acid component has been shown to enhance mitochondrial electron transport by acting as an electron shuttle between NADH and CoQ10, improving ATP production. Shilajit also increases intracellular transport of bioactive molecules across cellular membranes (fulvic acid's 'nutrient carrier' function), theoretically enhancing the bioavailability of co-administered supplements. Key safety concern: shilajit must be processed (purified) to remove heavy metals and mycotoxins — unprocessed shilajit from unverified sources poses contamination risk.
Indications
- Testosterone support — modest evidence for ~20% increase in healthy men
- Mitochondrial energy metabolism — CoQ10 synergism
- Cognitive function — emerging evidence in elderly
- General mineral supplementation and trace element delivery
- Male infertility (sperm count and motility — one supporting RCT)
Mechanism of Action
Shilajit's fulvic acid and dibenzo-α-pyrones (DBPs) serve as electron carriers in the mitochondrial inner membrane, shuttling electrons from NADH to CoQ10 — supplementing the endogenous electron transport chain. This electron-carrier function enhances mitochondrial ATP production and was demonstrated in vitro to increase Complex I activity by ~7-fold in models of mitochondrial dysfunction
Dosing
| Compound | Dose | Frequency | Notes |
|---|---|---|---|
| Shilajit resin or extract (standardized to fulvic acid content) | 250–500 mg | Twice daily (with milk or warm water) | The 2016 RCT used 250 mg twice daily (500 mg/day total); traditional Ayurvedic use: 300-500 mg/day; standardize to minimum 50% fulvic acid content |
Safety & Contraindications
- CRITICAL: Only use purified, processed, standardized shilajit — unprocessed shilajit may contain lead, arsenic, mercury, and mycotoxins at dangerous levels
- Look for products tested by third-party labs with COA (certificate of analysis) showing heavy metal testing
- Stimulating properties possible — some users report increased energy, heart rate; not recommended for those with hypertension
- Iron overload risk: shilajit has significant iron content — caution in hemochromatosis or already iron-replete individuals
- May lower blood sugar (minimal evidence) — monitor in diabetics on hypoglycemic agents
- Limited long-term safety data — most clinical trials are 90 days or less
- Avoid in pregnancy and breastfeeding — insufficient safety data