"Exosome Serums: I Checked the Science on 4 Viral Products"

15 September 2026

"Exosome" is printed on a $24 bottle from a high-street brand and on a $655 set from a Harley Street clinic brand. We wanted to know what the word actually tells you, and what the extra money buys. The short answer: the biology is real, the early research is promising, and almost none of that research is about a serum you can buy off the shelf [3].

What we checked

Some shops quote higher "list" prices for two of these: $39 for the medicube, and over $800 for the 111Skin. Those are the shops' numbers, not the brands' [6].

What the label said

First, what an exosome is. Almost every cell releases tiny sealed bubbles. Once thought to be waste, they turned out to be messages: parcels of proteins and genetic instructions that a neighbouring cell absorbs and acts on, such as "make more collagen" or "repair this". That is why brands want the word on the box.

The catch is that exosomes have to come from somewhere, and the label does not have to say where. The ones used in clinics, and in nearly all the published research, come from human material such as platelets, stem cells or skin cells. Human material is expensive and comes with ethical and legal complications, so cheaper sources have appeared: cow's milk, plants such as rose and centella, bacteria, and lab-built versions. All of them can be called "exosome" on a label [3].

Here is what each bottle told us.

The INKEY List. The product page claims 300% more collagen and 55% less inflammation in eight hours. The asterisk explains that those figures come from a lab dish, not from anyone's face, and that they measure genes involved in making collagen rather than collagen itself. The brand's figures from real people are much smaller and come from a group of 26 people over four weeks. On the ingredients list, the exosome sits 24th of 26. Ectoin, a well-evidenced hydrating ingredient, sits ninth [6].

medicube. This one contains microscopic sponge-derived needles that make small channels in the skin, and the label says so, warning of tingling and redness. The same bottle gives two different quantities for itself: 7,500 parts per million, and 15 million "shots". Neither can be checked. The brand page claims a 242% boost in absorption; one shop selling it had rounded that up to 262%. Its exosomes come from bacteria [6].

Plated INTENSE. About $17 a millilitre. Its exosomes are human, from platelets [1, 6].

111Skin. Its exosomes are plant-derived, the same broad category as the $24 bottle [6].

What the evidence shows

Size is the first problem. A human hair is about 75 microns across, and around 750 exosomes would line up across it. The skin's outer layer exists to keep particles that small out. That is why clinics first make tiny channels with microneedling or a laser, then apply exosomes. A serum on its own is knocking on a wall. That does not mean it does nothing; it means expectations should be modest.

Plated is the only one of the four with a published human trial on the product you can buy. It came out of the Mayo Clinic: a trial of 56 people aged 40 to 85 over six weeks, measured with imaging rather than opinion. Wrinkles, redness and dark spots all improved [1]. The limits matter too. There was no control group, so nobody was compared against a placebo. Two of the authors work for the company, one as an employee and one as a co-founder, and they disclosed this in the paper. A longer follow-up found a meaningful wrinkle improvement in 38% of people: a real result, and fewer than half [1, 2].

We looked for a published trial on the 111Skin set and could not find one. That does not prove none exists, but at $655 it is reasonable to expect to be shown it.

The wider research is encouraging but early. A 2026 review gathered 39 human studies on exosomes. Its authors rate their own evidence at level three, which is not the top tier. Of the 26 skin studies, only 11 tested a product on its own; in the rest, exosomes came with microneedling, a laser or an injection [3]. So most of the encouraging numbers describe clinic treatments, not a bottle on a shelf.

You may hear that no exosome product is FDA approved. That is true [4], but almost no serum you own is FDA approved either, so it says little on its own.

The verdict

Our scores, out of five, for real reviews and for independent science: The INKEY List 5 and 2; medicube 4 and 2; Plated 4 and 3; 111Skin 3 and 1. If you like the idea, The INKEY List is a sensible buy at $24, for the ectoin and the hydration rather than the exosome, and you are not paying a premium for the word. If you want the product with published human evidence behind it, that is Plated, and you now know what that study did and did not do. We would wait on medicube, where the needles are doing the work and the brand's own numbers disagree, and on 111Skin, which costs 27 times more than the cheapest bottle for the same broad kind of exosome without a trial we could find.

Exosomes are real biology; almost none of the evidence is about the serum on the shelf.

Worth knowing

• One widely quoted figure is missing from this post on purpose. A 2026 review reports a pooled average wrinkle improvement, but the same paper's methods section says a formal pooled analysis was not performed. When a source contradicts itself, we leave the number out. -- If you are pregnant or breastfeeding, dermatologists advise skipping exosomes for now: not because harm has been shown, but because safety has not been established. If you have questions about your own skin, talk to a clinician.
• No sponsorships. Nothing here was paid for.

Watch the video

The full walk-through of all four labels is in the video: Exosome Serums: I Checked the Science on 4 Viral Products.

Sources

1. Proffer et al., Aesthetic Surgery Journal, 2022, doi 10.1093/asj/sjac149
2. Stack et al., Aesthetic Surgery Journal, 2026, doi 10.1093/asj/sjaf178
3. Maher et al., Dermatological Reviews, 2026, doi 10.1002/der2.70071
4. US FDA, Consumer Alert on regenerative medicine products including stem cells and exosomes
5. NBC Selected, exosomes in skin care, updated 10 September 2026
6. Brand pages and retailer listings for The INKEY List, medicube, ( plated ) and 111Skin, as read on 14 September 2026

Every claim above is sourced in the text. Prices are what we paid, on the date shown. We buy what we test; nothing is gifted, and nothing is sponsored.