Exosome Hair Serums: How to Read the Label and Three Products We Checked
An exosome hair serum is a cosmetic scalp product. The amount and origin of the exosomes in a bottle cannot be checked from the label. We read three makers' own pages and describe what each says, what its ingredient list shows and what we could not verify.
Hair loss can have medical causes. See a doctor or dermatologist before starting any treatment.
Last editorial check: October 15, 2026Sources listed belowNo promises of results
What to look at on a label
Look for exosomes in the ingredient list
Ingredient lists use standard names. On the pages we captured, two of the three makers show a full list, and neither has an entry named exosomes. The third lists "active ingredients" but not a full list.
Ask where they come from
Makers describe sources such as human platelets, cells from the umbilical cord or plants. These are different materials.
Be careful with counts
One maker states trillions of exosomes per bottle. The page we read gives no method for how that was measured.
Read test claims closely
Look for the number of people, a comparison group and who ran the test.
Separate looks from growth
Cosmetic claims are about how hair looks. A serum is not a way to treat a medical cause of hair loss. See a doctor if you are losing hair.
Three serums we checked
We read each maker's own product page on October 15, 2026 and saved a capture. This is a plain description, not a ranking, and we cannot verify the amount or origin of exosomes in any of them. We list no prices and no buy links.
| Product and maker | What the maker says about the exosomes | Ingredient list on the maker's page | What we could not check |
|---|---|---|---|
| Renew Exosome Scalp Serum, Elevai Skincare. 20 mL, leave-in. | The maker describes the source as "umbilical stem cells". | A list of active ingredients that names the exosomes by the maker's brand name, plus niacinamide, biotin, panthenol, caffeine, aloe vera, hyaluronic acid and copper peptides. We could not see a full ingredient list on the page we captured. | Amount and exact source. The page shows before-and-after photos and a 16-week result, and the page text we captured does not point to a study. |
| HAIR Serum, plated. 30 mL. | Platelet-derived exosomes, stated as more than 2 trillion per bottle. | Full list includes human platelet extract. No entry is named exosomes. | How the count was made. One double-blind, placebo-controlled study exists for this product (PMID 40104384): 39 adults, 6 months against placebo, funded in part by the technology company. |
| Scalp Serum, Blair Skincare. Daily leave-in. | Described as exosome-powered. | Full list includes human platelet extract, plant extracts, caffeine and several peptides. No entry is named exosomes. | Amount. The page gives percentages from a 12-week consumer use study, and the page text we captured does not state the number of participants with them. |
What the one serum study found, and its limits
The 2025 study, titled "Human Platelet Extract (Plated) Hair Serum for Hair Health Improvement", tested plated HAIR Serum and enrolled 39 healthy adults who felt their hair was thinning. They used the serum for nine months or a placebo for six months, with the option to switch to the serum. A blinded evaluator rated volume, density and scalp coverage better with the serum than with placebo at months 3 and 6, and no adverse effects were observed. The study was funded in part by Rion Aesthetics, Inc. The paper's disclosures list consulting roles and an ownership interest in that company for several authors (PMID 40104384). It is one study of one product.
Before you use any scalp serum
- If you are losing hair, see a doctor first.
- If your scalp stings, itches or swells, stop and ask a doctor.
- Do not use a serum on skin that is infected or inflamed.
- Do not expect it to work like a clinic procedure.
Questions
Do exosome hair serums work?
It depends on the product. Among the sources we cite there is one double-blind, placebo-controlled study of one serum, with 39 adults, funded in part by the technology company behind it. It covers the plated serum only. The other two serums we read about have no study in our sources.
Can I check how many exosomes are in a bottle?
Not from the label. Some makers state a count, but the pages we read gave no method for it. We cannot verify the amount or origin of exosomes in any of these products.
Is a serum the same as a clinic treatment?
No. A serum is applied at home without microneedling. The studies of exosomes after microneedling do not apply to a serum, and the serum study we cite does not apply to clinic treatments.
Sources
This page has not yet been reviewed by a licensed clinician. Sources are listed below. Last editorial check: October 15, 2026.
- Weir et al., double-blind placebo-controlled study of a topical serum, 2025 (PMID 40104384)
- Lee et al., literature review on exosomes in trichology, 2026 (PMID 41561359)
- Maker pages, each read on October 15, 2026: Elevai Skincare (Renew Exosome Scalp Serum), plated skin science (HAIR Serum) and Blair Skincare (Scalp Serum). We link none of them.