Shilajit

Medically reviewed by Prof. Giorgi Pkhakadze, MD, MPH, PhD — GMJ Editorial Board

What is Shilajit?

Shilajit is a sticky, tar-like resin that seeps from rocks in high-altitude mountain ranges, particularly the Himalayas, Altai, Caucasus, and other mountain chains. Formed over centuries through the decomposition of plant matter and microbial action, shilajit contains a complex mixture of organic compounds, minerals, and bioactive substances. The primary active component is fulvic acid, which comprises 15-20% of the substance and is responsible for many of its purported health benefits.

Traditionally used in Ayurvedic medicine for thousands of years, shilajit is considered a “rasayana” or rejuvenative compound. The name literally translates to “conqueror of mountains and destroyer of weakness” in Sanskrit. Commercial shilajit supplements are typically processed and purified extracts standardized for fulvic acid content, available in powder, capsule, or resin forms.

Health benefits & uses

Moderate evidence:

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• Male fertility and testosterone support: Several small clinical trials suggest shilajit may help improve sperm quality and testosterone levels in men with oligospermia or low testosterone
• Energy and fatigue reduction: Limited studies indicate potential benefits for reducing chronic fatigue and improving physical performance

Limited evidence:

• Cognitive function: Preliminary research suggests potential neuroprotective effects and memory enhancement, though human studies are limited
• Altitude sickness: Traditional use and some animal studies suggest possible benefits for high-altitude adaptation
• Anti-aging properties: In vitro studies show antioxidant activity, but clinical evidence in humans is insufficient
• Heart health: Some animal studies suggest cardiovascular benefits, but human data is lacking

How it works

Shilajit’s mechanisms of action are primarily attributed to its fulvic acid content and mineral composition. Fulvic acid acts as a potent antioxidant, potentially protecting cells from oxidative damage. It may also enhance mitochondrial function by supporting cellular energy production and improving nutrient absorption at the cellular level.

The compound appears to influence hormone production, particularly testosterone, through mechanisms that are not fully understood. Some research suggests it may support the hypothalamic-pituitary-gonadal axis. Additionally, shilajit contains trace minerals including iron, calcium, copper, and zinc, which play roles in various physiological processes.

The dibenzo-α-pyrones present in shilajit may contribute to its potential cognitive benefits by supporting neurotransmitter function and protecting against neurodegeneration, though this remains largely theoretical based on laboratory studies.

Dosage

No official RDA or UL has been established for shilajit. Typical dosage ranges in clinical studies and traditional use include:

• Standardized extract: 200-500 mg daily, usually standardized to contain 50-60% fulvic acid
• Purified resin: 300-500 mg daily, often divided into two doses
• Powder form: 100-250 mg daily

Most studies showing benefits used doses of 200-500 mg daily for 60-90 days. It’s typically recommended to start with lower doses and gradually increase. Taking shilajit with meals may improve absorption and reduce potential gastric irritation. Consultation with a healthcare provider is strongly recommended before beginning supplementation, especially for therapeutic purposes.

Food sources

Shilajit is not found in conventional food sources. It is exclusively obtained from natural rock exudates in specific high-altitude mountainous regions. The substance forms naturally through geological processes over hundreds of years and cannot be cultivated or produced through agricultural means.

All available shilajit for consumption comes from harvesting the natural resin from rock formations, followed by purification and processing to remove contaminants and standardize active compounds. Quality varies significantly depending on the source location, harvesting methods, and purification processes used by manufacturers.

Safety & side effects

Shilajit is generally considered safe for most adults when obtained from reputable sources and used appropriately. However, quality and purity vary significantly among products. Raw or poorly processed shilajit may contain heavy metals, mycotoxins, or other contaminants.

Reported side effects are typically mild and may include:

• Digestive upset or nausea
• Dizziness
• Headache
• Increased heart rate (rare)

Due to limited long-term safety data, extended use should be monitored by healthcare providers. The iron content in shilajit may be a concern for individuals with hemochromatosis or iron overload conditions.

Interactions

Shilajit may interact with certain medications and supplements:

• Diabetes medications: May enhance blood sugar-lowering effects, requiring monitoring
• Blood thinners: Potential interaction due to mineral content
• Iron supplements: May increase iron absorption and risk of iron overload
• Hormone therapies: Could potentially interact with testosterone or other hormone treatments

The fulvic acid in shilajit may enhance absorption of other supplements or medications, potentially altering their effectiveness. Always inform healthcare providers about shilajit use before starting new medications.

Who should be cautious

Certain groups should exercise caution or avoid shilajit:

• Pregnant and breastfeeding women: Safety data is insufficient
• Children: No established safety profile for pediatric use
• People with hemochromatosis: High iron content may worsen iron overload
• Individuals with active heart disease: Limited safety data for cardiovascular conditions
• Those with autoimmune conditions: Potential immune system effects are unclear
• People scheduled for surgery: Should discontinue 2 weeks before surgery due to potential bleeding risk

Frequently asked questions

Is shilajit the same as fulvic acid?

No, shilajit contains fulvic acid as its primary active component (15-20%), but it also includes many other organic compounds, minerals, and bioactive substances. Pure fulvic acid supplements are different products with potentially different effects.

How long does it take to see benefits from shilajit?

Most studies showing benefits used shilajit for 60-90 days. Some users report increased energy within a few weeks, while hormonal effects like testosterone enhancement may take 2-3 months to become apparent.

Can women take shilajit?

While traditionally used by both men and women in Ayurvedic medicine, most modern research has focused on male fertility and testosterone. Women may use shilajit for general wellness purposes, but should consult healthcare providers, especially if pregnant or breastfeeding.

What should I look for when buying shilajit?

Choose products that are third-party tested for purity, standardized for fulvic acid content (typically 50-60%), and free from heavy metals and contaminants. Avoid products that seem unusually cheap, as quality processing is expensive.

Can I take shilajit with other supplements?

Generally yes, but shilajit may enhance absorption of other nutrients and supplements. Start with lower doses when combining, and space doses apart if taking iron supplements to avoid excessive iron intake.