Shilajit Safety, Side Effects and Quality
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Shilajit quality varies, so safety depends heavily on sourcing, testing and responsible use. This guide explains potential side effects, heavy metal concerns, who should be cautious and what to check before choosing a product.
Safety Evidence
A 91-day safety study by Velmurugan et al. (2012) found no adverse effects on liver function, kidney function, blood markers, or organ health with daily purified shilajit use at recommended doses. This is the primary clinical safety reference for shilajit supplementation.
Side Effects
- Digestive discomfort — mild nausea when taken on an empty stomach. Taking with food resolves this in most cases.
- Increased iron absorption — fulvic acid may enhance iron uptake. This may be a consideration for people with haemochromatosis.
- Mild hypotensive effect — some animal studies suggest a mild blood pressure-lowering effect. Relevant for people on antihypertensive medication.
- Allergic reactions — rare, but possible in individuals sensitive to humic substances.
- Heavy metal contamination — the most serious risk, specific to unpurified or untested products. Choosing a verified, lab-tested shilajit significantly reduces this risk.
Who Should Be Cautious
- Pregnant or breastfeeding women
- People with haemochromatosis (iron overload)
- People with active kidney disease
- People with gout
- Children under 18
- Anyone on prescription medication — speak to your GP first
Quality Standards
What to look for when choosing shilajit:
- ✅ Independent lab certificate (Eurofins or equivalent)
- ✅ Stated fulvic acid percentage
- ✅ Heavy metal screening results
- ✅ Clear sourcing information
- ✅ No undisclosed additives
5 Rivers Nutrition's Shilajit Gold+ products are Eurofins batch-tested with 76–79% fulvic acid. View our lab testing information →
Our manufacturing process is designed around purity at every stage — from raw material sourcing to GMP-certified production. You can also learn how to verify shilajit authenticity yourself before buying from any brand.
For a Quality-First Option
Ready to choose a tested shilajit product? Explore 5 Rivers Nutrition's lab-tested shilajit capsules, shilajit resin and bundles — all independently verified by Eurofins.
Frequently Asked Questions
Can shilajit cause side effects?
Some people may experience unwanted effects, particularly digestive discomfort when starting. Stop using it if it does not agree with you and speak to a healthcare professional if unsure.
Who should avoid shilajit?
People who are pregnant, breastfeeding, taking medication or managing a medical condition should speak to a healthcare professional before using supplements including shilajit.
Why are heavy metals discussed with shilajit?
Because poor-quality or untested shilajit may contain contaminants. Choose products with clear quality controls and independent testing to reduce this risk.
Why should shilajit be lab-tested?
Untested raw shilajit may contain contaminants such as heavy metals. Lab testing helps confirm purity and gives customers confidence in product quality.
Is shilajit safe to take daily?
A 91-day clinical safety study found no adverse effects with daily purified shilajit use. Always use a product with independent third-party lab certification and follow dosage guidance.
Is shilajit legal in the UK?
Yes — shilajit is legal in the UK as a food supplement under the Food Supplements (England) Regulations 2003.
Aman Singh
Founder of Five Rivers Nutrition. | Last reviewed: May 2026