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Is Exosome Therapy Safe? Side Effects, Risks and Unknowns

Nobody can say it is safe in general, because the answer depends on the product, how it was made and who applies it. Short-lived redness and swelling are common after microneedling, and the exosome product adds unknowns.

No exosome product is FDA approved, so there is no reviewed standard for what is in the bottle.

Last reviewed October 15, 2026

What is known

The best-documented risks come from microneedling, the device step. A systematic review of 85 articles found the most common events were short-lived and expected, lasting up to 7 days: redness and swelling, pain, post-inflammatory pigment change, dry skin and peeling, swollen lymph nodes and irritant contact dermatitis. It also reported lasting problems in some people: persistent pigment change, tram-track scarring and granulomatous reactions. It linked higher risk to active infection, darker skin and metal allergy. (2021 review, PubMed, PMID 34448760)

That review urged caution when microneedling is combined with products not intended to be applied with microneedles.

What is not known

  • What is in the bottle. Reviews describe varied biological sources and methods, and note that products called "exosomes" do not always show an exosome origin. (2026 review, PubMed, PMID 42353255)
  • Long-term safety. Reviews of exosome studies ask for longer follow-up and larger samples. (2026 review, PubMed, PMID 42027180)
  • Quality control. The 2026 narrative review above refers to reports of adverse reactions linked to unapproved products sold as exosome-based, and calls for stronger oversight.

A 2026 review of 19 human studies reported that most studies described a positive safety profile for topical use, and noted reports with other products, which this site does not cover. (2026 review, PubMed, PMID 41756341) Positive reports from small, short studies do not settle safety.

What the FDA reported

In its notice of December 6, 2019, the FDA described serious adverse events in patients in Nebraska who were treated with unapproved products marketed as containing exosomes. It said it was assessing the situation with federal and state partners. The notice is current as of that date; we cannot see from the page whether it has been updated. (FDA notice, December 6, 2019)

Who should avoid it or ask a doctor first

  • Anyone with an active infection or open skin in the area
  • People with an allergy to a listed ingredient or to metals
  • People with darker skin, who should ask about the risk of side effects
  • People who form raised scars easily
  • Pregnant people
  • Anyone with a health condition

This site covers cosmetic uses only. For any medical condition, talk to a doctor.

Questions to ask the clinic

  1. Which product will you use, and who makes it?
  2. What documents can you show about it?
  3. Who will apply it, and what is their license?
  4. Is the device FDA cleared, and for what use?
  5. What side effects have your patients had, and what do you do if I have one?
  6. Can I have the price and the aftercare steps in writing?

When to call a doctor

Call your clinic or a doctor if redness, pain or swelling gets worse instead of better, or if you have fever or pus. Call 911 for trouble breathing. Report a problem with exosome products or other unapproved products to the FDA through MedWatch.

Common questions

What are the side effects of exosome therapy?

For the microneedling part, a 2021 review of 85 articles found short-lived redness or swelling, pain, dry skin or peeling, with most events passing within about 7 days. Persistent problems were rarer. For the exosome product itself, safety data are limited and uneven.

Is it safe to do at home?

We do not recommend applying exosome products to freshly needled skin at home. The 2021 review advises caution with products not intended to be applied with microneedles.

Who should not have it?

Anyone with an active skin infection in the area, an allergy to a listed ingredient or to metals, or a health condition should talk to a doctor first. Darker skin raised the risk of side effects in one review, so mention it at the consultation.

When should I call a doctor?

Call your clinic or a doctor if redness, pain or swelling gets worse instead of better, or if you have fever or pus. Call 911 for trouble breathing. Report problems with unapproved products to the FDA through MedWatch.

Sources

This page has not yet been reviewed by a licensed clinician. Sources are listed below. Last editorial check: October 15, 2026.

  1. 2021 systematic review of microneedling safety, PubMed, PMID 34448760
  2. 2026 narrative review of extracellular vesicles in aesthetic medicine, PubMed, PMID 42353255
  3. 2026 systematic review of microneedling with exosomes, PubMed, PMID 42027180
  4. 2026 systematic review of human studies, PubMed, PMID 41756341
  5. FDA public safety notification on exosome products, December 6, 2019
  6. FDA MedWatch adverse event reporting program