Shilajit, Sea Moss and Colostrum for Skin: What the Evidence Actually Shows

Shilajit, sea moss and bovine colostrum are three of the most-promoted wellness supplements online, often with claims of glowing skin, more collagen and slower aging. The short answer: none of the three has a published human clinical trial showing it improves wrinkles, elasticity or skin aging. Shilajit has small trials for other outcomes and a real heavy-metal contamination concern. Sea moss can deliver a large and unpredictable dose of iodine. Colostrum has lab studies on skin cells and some topical interest, but no solid human skin data. If skin is your goal, your money goes further on sunscreen and a retinoid.

The short answer

Supplement	Skin evidence	Key risk
Shilajit	No human skin trials	Heavy metals if unpurified
Sea moss	No human skin trials	Too much iodine
Bovine colostrum	Lab cell studies only	Dairy allergy

• Supplements don't need FDA approval for effectiveness before sale, so quality varies (NIH Office of Dietary Supplements).
• Look for third-party testing seals (USP, NSF) and talk to your doctor or pharmacist, especially if you are pregnant, breastfeeding or take medicines.

Shilajit

Shilajit is a sticky, tar-like resin from mountain rock in the Himalayas and elsewhere, used in Ayurvedic medicine. It is rich in fulvic acid. Human studies are small and not about skin: a 90-day trial of purified shilajit in healthy men reported higher testosterone levels (Pandit et al., Andrologia, 2016), and a trial in postmenopausal women found it helped preserve bone density and lowered oxidative stress and inflammation markers (Pingali et al., Phytomedicine, 2022). Lower oxidative stress is plausible-sounding for skin, but no one has measured skin outcomes.

The real concern is contamination. A study of Ayurvedic medicines bought online found that about 1 in 5 contained detectable lead, mercury or arsenic, including products made in the US (Saper et al., JAMA, 2008). Raw or poorly processed shilajit can carry metals and fungal contaminants. Only buy purified products with a certificate of analysis for heavy metals.

Sea moss (Irish moss)

Sea moss usually means red seaweeds such as Chondrus crispus, sold as gels, gummies and capsules. These algae contain carrageenan, minerals and polysaccharides, and lab research describes antioxidant and other biological activity (Park et al., Mar Drugs, 2024). Carrageenan is widely used in creams as a thickener; that doesn't make it an anti-aging active.

Watch the iodine. Seaweeds can be very high in iodine and the amount varies widely between products. The adult upper limit is 1,100 mcg a day, and too much iodine can cause thyroid problems, especially in people with thyroid disease (NIH ODS: Iodine). Seaweed can also absorb heavy metals from water. If you have thyroid disease, ask your doctor before using sea moss.

Bovine colostrum

Colostrum is the first milk a cow produces after giving birth, rich in antibodies and growth factors. In the lab, a liposomal colostrum preparation increased proliferation of human skin fibroblasts and reduced telomere shortening over 8 weeks in culture (Jogi et al., J Drugs Dermatol, 2021). Extracellular vesicles from colostrum helped aged and damaged skin cells in lab experiments (Han et al., Pharmaceutics, 2022). These are cell studies, not trials in people. Oral colostrum has been studied mainly for gut and immune outcomes.

Avoid colostrum if you have a cow's milk allergy. It is not lactose-free.

What actually helps skin age better

1. Daily broad-spectrum SPF 30+: the best-proven anti-aging step (AAD: wrinkle remedies). See our sunscreen anti-aging guide.
2. A nightly retinoid: retinol vs retinoid.
3. If you want a supplement with some skin data, read do collagen supplements work? For longevity supplements, compare urolithin A and NAD+ precursors.

Frequently asked questions

Does shilajit help skin or wrinkles?

There are no human trials on skin. Small trials looked at testosterone and bone health. Contamination with heavy metals is the bigger worry.

Is sea moss good for your skin?

There is no clinical evidence that eating sea moss improves skin. Its iodine content can be high, which matters for thyroid health.

Can colostrum reverse skin aging?

Lab studies on skin cells are interesting, but no human trials show it reverses aging.

Can I put sea moss gel on my face?

Some people use it as a mask. It is mostly a hydrating gel; patch test first and stop if irritation develops.

Are these supplements safe to take together?

There is no safety research on combining them. Talk to your doctor or pharmacist, especially if you take thyroid medicine or have health conditions.

Bottom line

Shilajit, sea moss and colostrum are trending, but none has human evidence for better skin. Each has a specific risk: heavy metals, excess iodine and dairy allergy. If you try one, choose third-party tested products and talk to your doctor first. For visible results, stick with sunscreen and retinoids.

This article is for educational purposes only and is not medical advice. Talk to your doctor or dermatologist about your situation.

Sources

• Pandit S, et al. Clinical evaluation of purified Shilajit on testosterone levels in healthy volunteers. Andrologia. 2016.
• Pingali U, et al. Shilajit extract preserves bone mineral density in postmenopausal women. Phytomedicine. 2022.
• Saper RB, et al. Lead, mercury, and arsenic in US- and Indian-manufactured Ayurvedic medicines sold via the Internet. JAMA. 2008.
• Park SJ, et al. Chemical constituents and biological properties of Chondrus red algae. Mar Drugs. 2024.
• NIH Office of Dietary Supplements: Iodine
• Jogi R, et al. Bovine Colostrum, Telomeres, and Skin Aging. J Drugs Dermatol. 2021.
• Han G, et al. Bovine colostrum-derived exosomes to repair aged and damaged skin cells. Pharmaceutics. 2022.
• NIH Office of Dietary Supplements: What You Need to Know
• American Academy of Dermatology: Wrinkle remedies