What is Shilajit?

Shilajit is a tar-like exudate found seeping from rock strata at high altitudes in the Himalayas, Altai, Caucasus, and other mountain ranges, formed from centuries of compression and humification of plant material. It has been a cornerstone of Ayurvedic medicine for over 3,000 years, historically classified as a rasayana — a rejuvenating substance believed to promote longevity and vitality. Modern analysis has identified fulvic acid (comprising 60–80% of its bioactive content) and dibenzo-alpha-pyrones as the primary pharmacologically active constituents.

How does Shilajit work?

Fulvic acid acts as a potent electron carrier and facilitates mitochondrial energy production by enhancing electron transport chain efficiency, which may explain reported improvements in physical energy and reduced fatigue. Dibenzo-alpha-pyrones and their chromoprotein complexes appear to protect dopaminergic neurons, support acetylcholine synthesis, and modulate inflammatory signaling. Shilajit also appears to regulate gonadotropins at the pituitary-hypothalamic axis, which may account for its observed effects on testosterone levels in men.

What forms does Shilajit come in?

Purified resin dissolved in warm water or milk is considered the most bioavailable form and most consistent with traditional use. Capsule and powder forms vary significantly in quality and standardization — look for products with documented fulvic acid percentage, heavy metal testing, and ideally third-party certification. Some products list 'PrimaVie' as a branded, clinically studied standardized extract. Avoid raw or unprocessed shilajit, which may carry safety risks from contamination.

Where it comes from:

In Ayurvedic texts including the Charaka Samhita and Sushruta Samhita, shilajit was described as a panacea capable of treating virtually all disease. It was historically prescribed for kidney stones, diabetes, anemia, and sexual dysfunction. Traditional preparation involved dissolving it in warm milk or ghee, a practice that may enhance absorption of its fat-soluble constituents. Its use in Central Asian and Russian folk medicine as 'mumijo' parallels its Ayurvedic reputation for wound healing, bone repair, and restorative energy.

What does Shilajit help with?

• Low Testosterone: A double-blind, placebo-controlled trial by Pandit et al. (2016, Andrologia, n=96 healthy men aged 45–55) found that 250 mg twice daily of purified shilajit for 90 days produced statistically significant increases in total testosterone, free testosterone, and dehydroepiandrosterone (DHEAS) compared to placebo. The proposed mechanism involves shilajit's fulvic acid stimulating gonadotropin release (LH, FSH) from the pituitary, which in turn drives Leydig cell testosterone synthesis in the testes. A separate RCT by Biswas et al. (2010, Andrologia, n=60) in infertile men found improvements in sperm count and motility alongside rises in total testosterone after 90 days of shilajit supplementation.
• Physical Fatigue and Exercise Performance: A randomized, double-blind, placebo-controlled trial by Keller et al. (2019, Journal of the International Society of Sports Nutrition, n=63 healthy sedentary adults) found that supplementation with PrimaVie standardized shilajit (500 mg/day) for 8 weeks significantly attenuated the loss of maximal muscular strength after fatigue-inducing exercise and maintained circulating total and free testosterone levels compared to placebo. Shilajit's dibenzo-alpha-pyrones support mitochondrial coenzyme Q10 recycling, improving electron transport chain efficiency in skeletal muscle, which may reduce oxidative fatigue and support ATP regeneration during sustained physical effort.
• Cognitive Decline: Fulvic acid, a primary constituent of shilajit, has been shown in human cell-based and mechanistic research to inhibit tau protein aggregation and amyloid-beta fibril formation — both hallmarks of Alzheimer's disease pathology. Shilajit also appears to support cholinergic neurotransmission by preserving acetylcholine availability. While direct large-scale human RCTs in dementia populations are not yet available, a pilot study and mechanistic review by Carrasco-Gallardo et al. (2012, Journal of Alzheimer's Disease) examined the potential of fulvic acid as a cognitive protective agent, supporting its use as an adjunct for early-stage cognitive support rather than established dementia treatment.
• Altitude Sickness: Traditional Ayurvedic medicine has long employed shilajit for acclimatization at high altitudes, and some mechanistic rationale supports this: fulvic acid may enhance red blood cell oxygen-carrying capacity and mitochondrial efficiency under hypoxic conditions. A human pilot study by Meena et al. (2010, International Journal of Ayurveda Research) examined shilajit's effects on physical performance in healthy volunteers in mountainous terrain, reporting improvements in subjective energy and reduced fatigue markers, though this study was small and not powered to confirm altitude sickness prevention. Stronger controlled trial evidence is lacking, and this indication should be viewed as traditionally supported but clinically preliminary.
• Iron Deficiency Anemia: Shilajit contains bioavailable iron chelated to fulvic acid, which may enhance intestinal iron absorption. A small clinical study by Velmurugan et al. (cited in traditional medicine literature) and mechanistic research suggest that fulvic acid-bound iron has higher bioavailability than inorganic iron salts and may produce less gastrointestinal irritation. This makes shilajit a candidate adjunct for iron-deficiency anemia, though it should not replace standard-of-care iron supplementation in confirmed deficiency — the evidence base remains limited to small studies and mechanistic reasoning.

What can Shilajit help prevent?

• Testosterone decline with aging (supported by limited RCT evidence in middle-aged men)
• Exercise-induced muscle strength loss (supported by one RCT with standardized extract)

What are the side effects of Shilajit?

• Gastrointestinal discomfort (nausea, loose stools): more common when taken on an empty stomach
• Dizziness or lightheadedness: reported rarely, possibly related to trace mineral load or mild blood pressure effects
• Potential heavy metal exposure: risk is specific to unpurified or unverified products
• Increased uric acid levels: some mineral components may theoretically elevate uric acid; caution in patients with gout
• Hormonal changes: due to testosterone-supporting activity, not recommended in hormone-sensitive conditions (prostate cancer, breast cancer) without medical supervision
• Rash or allergic reaction: rare, reported in isolated cases

Good to know:

Purified, standardized shilajit is generally well tolerated in human clinical trials at doses up to 500 mg/day for periods of 90 days. The primary safety concern is with raw or unpurified products, which may contain heavy metals (lead, arsenic, mercury), mycotoxins, or oxidized free radicals — always purchase from tested, certified sources.

How much Shilajit should you take?

• Recommended daily: 300–500 mg/day of purified, standardized shilajit (minimum 50% fulvic acid); the most studied dose in RCTs is 250 mg twice daily (500 mg total) or 500 mg once daily
• Best time of day: Morning, or split morning/evening dosing if using 500 mg/day; some practitioners suggest taking alongside breakfast or a fat-containing meal to support absorption of fat-soluble DBP constituents
• With or without food: Best taken with food or warm milk/water to improve gastrointestinal tolerance and potentially enhance absorption of lipophilic constituents; traditional use was dissolved in warm milk
• Time to effect: Testosterone and hormonal effects: 8–12 weeks; Energy and fatigue reduction: 4–8 weeks; Cognitive support: effects may require 12+ weeks
• How long to take it: Clinical trials have studied continuous use for up to 90 days. Long-term use beyond 3 months is common in traditional practice but lacks robust controlled safety data. A cycling approach (e.g., 8–12 weeks on, 4 weeks off) is a reasonable precaution. Not recommended during pregnancy or breastfeeding due to insufficient safety data.