What to check on a shilajit supplement before you buy

Check three things on a shilajit supplement: whether the maker publishes a lot-specific lab report for heavy metals, what the label says about amount and extract type, and whether the claims match the small human trials that exist. Shilajit is a mineral-rich resin with a variable makeup, and the lab studies we found detected lead, arsenic and mercury in some samples, so "natural" on the box tells you nothing about purity.

This guide covers what shilajit is, what the metals research found, what fulvic acid claims can and cannot tell you, what the human trials used, and how to read a label. It is not medical advice, and it does not say shilajit works or does not work for anything.

What is shilajit, and what is actually in it?

Shilajit (also called mumie or mummiyo) is a dark, tar-like substance from mountain rock, used for generations in traditional medicine. A 2025 review in Critical Reviews in Analytical Chemistry reported that more than 80% of its weight is humic substances and about 20% is calcium, potassium and magnesium, along with amino acids, fatty acids and trace elements. The same review made a point that matters for shoppers: its chemical composition is not known with certainty, and the authors found that no comprehensive chemical analysis has ever been done. Even where it forms is debated.

In practice that means two jars sold as shilajit can differ a lot. The mountain region, the way it is collected and the way it is purified all change what you get. A product is not "shilajit" in the way a 500 mg vitamin C tablet is "vitamin C".

Can shilajit contain heavy metals?

Yes, it can, and this is the most useful thing to know before you buy. A 2024 review in Biological Trace Element Research reported that shilajit contains around 65 elements, including the toxic metals copper, aluminum, lead, arsenic, cadmium and mercury. The review says that in most of the studies it gathered, the reported levels were below the permissible limits it lists, for example 0.20 to 0.30 ppm for cadmium, 1 ppm for mercury and 10 ppm each for arsenic and lead, but that a few studies found levels above those limits. Its authors conclude that taking shilajit without knowing the metal levels is not safe.

A 2022 study in the same journal compared Indian and Pakistani shilajit sold worldwide, using three laser and spectroscopy methods. The authors reported that both contained lead, arsenic and mercury, among other metals, in amounts above the standard permissible limit, and that mercury was detected only in the Indian samples.

Two cautions. These are lab studies of a handful of samples, not a survey of the products on the shelf today, and many commercial products are purified. But that is the point: from the outside, you cannot tell which kind you are holding. Only a lab report for that batch can.

What do fulvic acid claims on a label tell you?

You will often see "contains 50% fulvic acid" or "5% fulvic acid" on a jar. Fulvic acid is one of the humic substances in shilajit, and a 2014 review in Phytotherapy Research named fulvic acid and dibenzo-alpha-pyrones as key constituents behind the effects seen in studies. That makes a fulvic acid percentage a reasonable thing to ask about, but it is not a quality guarantee. Three problems:

• A percentage says nothing about metals. A product can be high in fulvic acid and still carry contaminants.
• The percentage depends on the test method, and the label rarely says which one was used.
• A percentage of a small amount is still small. In our DentiCore review, "shilajit 5% fulvic acid" shares a 120 mg proprietary blend with chlorella, sodium copper chlorophyllin and boron citrate, so each ingredient is only a part of 120 mg and the split is not shown.

What did the human trials of shilajit actually use?

Human research on shilajit is small. The 2014 Phytotherapy Research review noted relatively few well-controlled human studies and called for more with standardized products. One example is a randomized, double-blind, placebo-controlled trial of purified shilajit in healthy men aged 45 to 55, who took 250 mg twice a day for 90 days. Compared with placebo, total testosterone, free testosterone and DHEAS were higher at the end, while LH and FSH stayed at similar levels. That is one trial of one purified product, and a change in a blood marker is not the same as feeling or performing better.

Our reviews of shilajit offers give the same range: human studies of purified shilajit generally use 250 to 500 mg a day. Compare that with what a sales page tells you. If a page lists no amount, you cannot tell whether a capsule holds a trial-sized serving or a pinch.

What do shilajit labels in our reviews show?

We have reviewed several offers that name shilajit among their ingredients. None of them is a pure shilajit resin, and in the ones below the page gives no amount for it:

• Neura combines lion's mane, goji, bacopa and shilajit, with no amount stated for any of the four and no supplement facts panel on the page. It carries a 90-day guarantee.
• RhythmONE is a tincture with five named botanicals including shilajit. Our review notes that its FAQ says nine ingredients and that most of its cited studies concern other things, such as saw palmetto and iodine.
• CogniSurge has five ingredients and no disclosed dose, and our review found checkout totals that did not match the order boxes.
• Genesis Revival lists seven botanicals with no doses and frames the product around the pineal gland, and our review found no study of the formula cited.
• Prostadine is a nine-ingredient liquid with no amounts, sold through Digistore24 with a 60-day guarantee.

Most of these have long refund windows (365 days for three of them), which is useful. But a refund is not lab testing. For how we score what a page discloses, see how we review.

A checklist before you buy a shilajit product

1. Look for a certificate of analysis that lists lead, arsenic, cadmium and mercury in numbers, names the limit it uses, and matches the lot number on your jar. A logo or the words "lab tested" is not a report.
2. Check that the label lists the amount of shilajit per serving. If shilajit sits inside a blend, ask yourself what share it could be.
3. Note the form: raw resin, purified resin, powder or extract. They are not interchangeable, and trial doses refer to purified or standardized products.
4. Find the maker's name and a real address or phone number. FDA rules require a domestic address or phone number for reporting serious adverse events on supplement labels.
5. Ignore disease claims. FDA does not approve supplements before they are sold, and the firm itself must be able to back up any structure or function claim.
6. Compare the price per serving, not per jar, and check the refund terms. Our ClickBank refund guide and Digistore24 refund guide explain the steps.

Who should talk to a doctor first?

Ask a doctor or pharmacist before you start shilajit if you take prescription medicine, are pregnant, breastfeeding or trying to conceive, have kidney disease, or have a hormone-related condition. A supplement that is studied for testosterone markers is a reason to ask first, not a reason to guess. If you already take a multivitamin or a mineral supplement, remember that shilajit adds minerals and metals on top of it.

If you only want to browse the category, our brain and memory reviews and men's health reviews include the offers above with their amounts and refund terms.

FAQ

Is shilajit safe to take?

That depends on the product and on you. The research we read says safety hinges on the metal content of the specific batch, since studies found lead, arsenic and mercury in some samples. A lab report for your lot is the best evidence you can ask for, and a doctor can advise on your own situation.

How much shilajit do studies use?

The human trials we found used about 250 to 500 mg a day of purified shilajit, for weeks to months. A product that does not state its shilajit amount cannot be compared with that.

Does a higher fulvic acid percentage mean a better product?

Not necessarily. The percentage says nothing about heavy metals, depends on the test method, and does not tell you how much shilajit you get per serving.

Does the FDA approve shilajit supplements?

No. FDA does not approve dietary supplements before they are marketed, and it mostly acts after a problem appears. That is why independent testing information on the label or from the maker matters.