Is Shilajit Safe for Women Over 50? What the Human Research Shows
Quick answer: Based on the published human research, yes. Across every human clinical study ever conducted on purified shilajit, zero serious adverse events have been reported. That record covers trials ranging from 45 days to 48 weeks, in men and in postmenopausal women. Below is the full picture, including the trial data, the heavy metals question, the estrogen question, the breast cancer question, and who should take a closer look before starting.
The trial record
When a supplement company says something is safe, that is not evidence. When every published human clinical trial reports the same outcome, that is worth examining.
The most rigorous human trial to date is the 2022 Pingali and Nutalapati study, published in the peer-reviewed journal Phytomedicine. It ran for 48 weeks in 60 postmenopausal women, ages 45 to 60, all with existing bone loss. The researchers ran complete blood panels at the start, at 24 weeks, and at 48 weeks. Not one woman discontinued because of a side effect. Every safety lab stayed within the normal range for the full 48 weeks.
These were not healthy young adults in a controlled academic setting. They were postmenopausal women with documented bone loss who took purified shilajit every day for nearly a year, and the safety profile was clean throughout.
A 2014 review by Stohs and colleagues, published in Phytotherapy Research, examined the full body of human and animal safety evidence available at that time. Their conclusion was that purified shilajit is generally well tolerated across both human trials and animal studies. That review, combined with the trials conducted since, is the basis for what is now an unbroken record: zero serious adverse events reported across any human shilajit study ever conducted.
The heavy metals question
This is the most common concern, and it is a fair one. Shilajit is a mineral-dense resin that forms in compressed rock layers over thousands of years. Any resin derived from geology can carry trace metals from its environment, and that is worth understanding before you start.
There are two layers to the answer here, and both are relevant.
The first is mechanism. The humic substances that make up a substantial portion of shilajit, including the fulvic acid that is its most active compound, are among nature's most effective metal-binding molecules. A 2024 review catalogued in PubMed found that the humic substances in shilajit actively bind and help neutralize roughly 12 of the trace heavy metals that can occur in rock-derived materials. The same compound that makes shilajit bioactive also provides a degree of internal protection against the metals in its geological source. https://pubmed.ncbi.nlm.nih.gov/38393486/
The second is testing. The concern about heavy metals in commercial shilajit is real, but it is a question about sourcing and manufacturing, not about shilajit as a category. A 2021 ICP-MS analysis of commercial shilajit products found that products meeting purification standards tested within FDA limits for arsenic, mercury, lead, and cadmium. https://pubmed.ncbi.nlm.nih.gov/34800280/
Source geography matters too. A 2025 analysis of thallium content across shilajit origins found that Altai-sourced shilajit carries substantially lower thallium concentrations than Iranian or Saravan-source material, which are the samples most commonly associated with contamination reports. https://pmc.ncbi.nlm.nih.gov/articles/PMC11743217/
For Optimum, every batch of shilajit from the Altai mountains is independently tested by a third party for heavy metals and mycotoxins, and meets Prop 65 standards in California, the most demanding ambient contamination threshold in the country.
The estrogen question
Many women over 50 are cautious about anything associated with estrogen. A personal or family history of hormone-sensitive cancer, a current prescription for aromatase inhibitors, or simply a general wariness about estrogen-adjacent supplements is common and understandable.
Shilajit is not a hormone. It does not add estrogen to your body and it does not behave like a synthetic estrogen in any known way.
What shilajit and the fulvic acid in it appear to do is support the body's own estrogen signaling at the cellular level. After menopause, circulating estrogen drops sharply. That drop quiets many of the signals that estrogen used to send throughout the body, in bone tissue, in the urinary tract, in the cardiovascular system, and elsewhere. The research on shilajit suggests it works on those cellular signaling pathways, helping tissues respond to the signals that do remain rather than flooding the system with an external hormone.
Supporting a cellular receptor pathway is a different mechanism from estrogen replacement. The human trial data on shilajit does not show the side effect profile associated with exogenous estrogen.
The breast cancer question
For any woman with a history of breast cancer, or one currently taking aromatase inhibitors, the breast cancer question comes up immediately when estrogen signaling is mentioned.
The available pre-clinical research points in a reassuring direction. A 2020 in vitro study by Rahmani Barouji and colleagues found that shilajit reduced the viability of MCF-7 and MDA-MB-231 breast cancer cells and induced apoptosis in those cells, while normal MCF-10A breast cells were substantially spared. https://pubmed.ncbi.nlm.nih.gov/34466597/
A 2024 mouse xenograft study by Gulcicek and colleagues found that tumor growth occurred in 100 percent of untreated control animals, while animals receiving fulvic acid showed substantially reduced tumor growth in both prophylactic and therapeutic conditions.
These are cell culture and animal results, not human clinical trials. They cannot be translated into a claim about human breast cancer outcomes. What they do say is that the pre-clinical safety signal for breast tissue is reassuring rather than alarming, which is the honest reading of what is available.
Who should pay closer attention before starting
The human safety record for purified shilajit is strong. That said, a few situations warrant a closer look.
If you are on a blood thinner such as warfarin or apixaban, be aware that direct human drug-interaction studies for shilajit essentially do not exist in the published literature. There is no documented interaction, and no human trial has looked for one. That is an honest gap in the evidence, not a documented risk, but it is worth knowing about if you are closely managing anticoagulation levels.
If you are managing a condition involving iron overload, such as hemochromatosis or thalassemia, the trace iron naturally present in shilajit is worth factoring in.
For the large majority of women over 50 who are not in those situations, the human trial record supports confident use. The 48-week Pingali trial, the broader Stohs safety review, and a 91-day toxicology study in rats at doses far above any normal human intake all point consistently in the same direction. https://pmc.ncbi.nlm.nih.gov/articles/PMC3609271/
What third-party tested actually means
The phrase is on many supplement labels and means very little when the company tests its own product. What it means when done correctly is that an independent, accredited laboratory with no business relationship to the manufacturer tests the actual product in its final form and issues a certificate of analysis, a detailed written record of what is and is not in the product.
For Optimum shilajit from the Altai mountains, that means a COA for each batch showing the fulvic acid standardization percentage, the full heavy metals panel covering arsenic, mercury, lead, and cadmium, and mycotoxin levels. The shilajit is cold pressed and purified, comes in a box of tablets rather than loose powder that loses its fulvic acid before it reaches you, and the testing results are available for each production batch.
We are a small, family-owned company out of Florida, and when you have a specific question about a batch or a COA, a real person answers.
What this means for you
The supplement industry is crowded with safety language that has nothing behind it. On the question of whether shilajit is safe for women over 50, the research gives a specific and consistent answer: zero serious adverse events in every human study ever done. A clean 48-week trial in postmenopausal women with full blood chemistry. A heavy metals profile that is independently tested and documentable. A pre-clinical breast tissue signal that points toward protection rather than harm. A sourcing geography that tests low for the contamination metals of concern.
That is a more complete safety record than most supplements carry.
If you want to try purified shilajit from the Altai mountains, independently third-party lab tested, you can find Optimum Shilajit here: https://www.liveoptimum.co/products/optimum-shilajit
Frequently asked questions
Has shilajit been tested specifically in women over 50?
Yes. The 2022 Pingali and Nutalapati trial was conducted entirely in postmenopausal women aged 45 to 60 and ran for 48 weeks. Full blood chemistry was run throughout and not one participant stopped because of a side effect.
Does shilajit contain heavy metals?
Unprocessed shilajit from lower-quality sources can. The humic substances in purified shilajit actively bind roughly 12 trace heavy metals from the source environment, and independently third-party lab-tested shilajit that meets Prop 65 standards tests within FDA limits for arsenic, mercury, lead, and cadmium.
Is shilajit a hormone? Will it raise my estrogen?
No. Shilajit is not a hormone and does not add estrogen to your body. It supports the body's own estrogen signaling at the cellular level, which is a different mechanism from hormone replacement.
Is it safe if I am on a blood thinner?
Direct human drug-interaction studies between shilajit and blood thinners such as warfarin do not currently exist in the published literature. There is no documented interaction, and no human trial has looked for one. That is an honest gap in the evidence rather than a documented problem.
What does third-party tested mean, and why does it matter?
Third-party testing means an independent laboratory with no business relationship to the manufacturer tests the actual product and issues a certificate of analysis. For Optimum shilajit, that COA covers the fulvic acid percentage and the heavy metals and mycotoxin panels, which is different from a company testing its own product.
References
- Pingali U, Nutalapati C. Shilajit extract reduces oxidative stress, inflammation, and bone loss to dose-dependently preserve bone mineral density in postmenopausal women with osteopenia: A randomized, double-blind, placebo-controlled trial. Phytomedicine. 2022;105:154334. https://pubmed.ncbi.nlm.nih.gov/35933897/
- Stohs SJ, et al. Safety and efficacy of shilajit (Mumie). Phytotherapy Research. 2014. https://pubmed.ncbi.nlm.nih.gov/23733436/
- Rahmani Barouji S, et al. Inhibitory effects of mumijo on breast cancer cell viability and induction of apoptosis. 2020. https://pubmed.ncbi.nlm.nih.gov/34466597/
- Heavy metals in shilajit and the binding activity of humic substances. Review. 2024. https://pubmed.ncbi.nlm.nih.gov/38393486/
- ICP-MS quantification of heavy metals in commercial shilajit supplements. 2021. https://pubmed.ncbi.nlm.nih.gov/34800280/
- Thallium content by shilajit geographic source region. 2025. https://pmc.ncbi.nlm.nih.gov/articles/PMC11743217/
- Velmurugan GV, et al. Safety evaluation of black shilajit: a 91-day subchronic toxicity study in rats. 2012. https://pmc.ncbi.nlm.nih.gov/articles/PMC3609271/