Shilajit, Skin and Hair: What the Human Evidence Shows

Shilajit is often promoted for glowing skin and thicker hair. When you look for the research behind that, what exists is narrow: one trial that looked at gene activity and blood flow in the skin of healthy women, one trial of a blood marker of collagen synthesis, and a muscle study that measured collagen-related genes. None of them measured wrinkles, skin hydration, elasticity or hair growth. This article sets out exactly what was measured, what was not, and where the real evidence for skin and hair sits instead.

The skin trial

The only study that looked at skin directly is a randomised trial in healthy adult women (Das 2019). Participants took shilajit at 125 mg or 250 mg twice daily for 14 weeks, with skin biopsies taken from the inner upper arm at the second and final visits for gene-expression profiling, and skin blood flow estimated from dermascopic images. The reported results:

• At the higher dose (250 mg twice daily), skin perfusion (microcirculation) improved compared with baseline and with placebo.
• Pathway analysis found shilajit-inducible genes relevant to endothelial cell migration, growth of blood vessels and the extracellular matrix, confirmed by real-time PCR.
• No adverse effects were reported in the 14 weeks.

What it does not show: the abstract reports no measurement of wrinkles, skin thickness, hydration, elasticity or how skin looked or felt. A change in gene activity and blood flow is a mechanism-level result. It could be a step toward a visible effect, but the trial did not test whether one occurs.

Collagen synthesis marker

Collagen is the main structural protein of skin. A 2024 randomised trial in 35 recreationally trained young men (mean age 21) tested 500 mg or 1,000 mg of shilajit a day for 8 weeks against placebo and measured serum pro-C1alpha1, a marker of type 1 collagen synthesis (Neltner 2024). In the low-dose group pro-C1alpha1 rose from 42.5 to 82.3 ng/mL, and in the high-dose group from 42.7 to 113.1 ng/mL, with no change in placebo. A higher share of the high-dose group (75%) exceeded the minimal clinically important difference than placebo (30%); the low-dose group (69%) did not differ significantly from placebo (p = 0.06).

Two cautions. The individual responses varied widely (the standard deviations are large), and a blood marker of collagen synthesis in young men does not establish any change in skin, in women, or in older adults. Earlier, a muscle biopsy study in overweight adults found 17 extracellular-matrix genes, including collagen, elastin and fibronectin, upregulated after 8 weeks of 250 mg twice daily; that study had no placebo group (Das 2016).

Hair

We screened PubMed records indexed under shilajit, mumie, mumijo and related names (about 145) and found no study of hair growth, hair loss or scalp condition in humans or animals. Claims that shilajit thickens hair, reduces shedding or treats alopecia have no direct research behind them. The collagen and blood-flow findings above are sometimes extended to hair by analogy, but that is speculation rather than evidence.

Where the evidence for skin and hair actually is

If your goal is skin or hair, the better-evidenced options are not supplements of this type. Our comparison of oral collagen with shilajit sets out the meta-analytic evidence for collagen peptides and skin (pooled randomised trials) in detail: see Shilajit vs Collagen. For hair loss, persistent shedding or scalp problems, a GP or dermatologist can look for causes such as iron status, thyroid disease or medication effects, which a supplement will not fix.

Safety notes

• Heavy metals. A 2024 review reported that shilajit can contain around 65 metals, including copper, aluminium, lead, arsenic, cadmium and mercury. Most reported levels were below WHO and FDA permissible limits, with a few studies reporting exceedances, and the review concluded that consumption without knowing metal levels is not safe (Hussain 2024). This is why batch testing matters.
• Allergy. One case report describes exercise-induced anaphylaxis in a woman with a possible mast cell disorder, with shilajit as a possible cofactor (Losa 2019). It is a single case, but a reason for caution with a history of anaphylaxis.
• Pregnancy. One case report links six months of mumijo use in pregnancy to high blood pressure and low potassium, a licorice-like syndrome that resolved on stopping (Stavropoulos 2018). Avoid during pregnancy unless a doctor advises otherwise.

Evidence summary

References

1. Das A, El Masry MS, Gnyawali SC, et al. Skin transcriptome of middle-aged women supplemented with natural herbo-mineral shilajit shows induction of microvascular and extracellular matrix mechanisms. J Am Coll Nutr. 2019;38(6):526-536. DOI: 10.1080/07315724.2018.1564088. PMID: 31161927.
2. Neltner TJ, Sahoo PK, Smith RW, et al. Effects of 8 weeks of shilajit supplementation on serum pro-C1alpha1, a biomarker of type 1 collagen synthesis: a randomized control trial. J Diet Suppl. 2024;21(1):1-12. DOI: 10.1080/19390211.2022.2157522. PMID: 36546868.
3. Das A, Datta S, Rhea B, et al. The human skeletal muscle transcriptome in response to oral shilajit supplementation. J Med Food. 2016;19(7):701-709. DOI: 10.1089/jmf.2016.0010. PMID: 27414521.
4. Hussain A, Saeed A. Hazardous or advantageous: uncovering the roles of heavy metals and humic substances in shilajit (phyto-mineral) with emphasis on heavy metals toxicity and their detoxification mechanisms. Biol Trace Elem Res. 2024;202(12):5794-5814. DOI: 10.1007/s12011-024-04109-4. PMID: 38393486.
5. Losa F, Deidda M, Firinu D, et al. Exercise-induced anaphylaxis with an Ayurvedic drug as cofactor: a case report. World J Clin Cases. 2019;7(5):623-627. DOI: 10.12998/wjcc.v7.i5.623. PMID: 30863761.
6. Stavropoulos K, Sotiriadis A, Patoulias D, et al. Pseudohyperaldosteronism due to mumijo consumption during pregnancy: a licorice-like syndrome. Gynecol Endocrinol. 2018;34(12):1019-1021. DOI: 10.1080/09513590.2018.1480713. PMID: 29933704.

Findings above are drawn from published abstracts; full texts were not reviewed. This article is general information, not medical advice.

Related Reading

• ComparisonShilajit vs Collagen
• Evidence reviewShilajit Science: What Human Evidence Actually Shows
• AuthenticityHow to Spot Fake Shilajit