Do exosomes in skincare really work?
There are preliminary indications that exosomes may do something for the skin, but the clinical evidence is very thin: one small study without a control group and otherwise mainly animal research. Do not buy into the hype just yet, but keep an eye on the research over the coming years.
One small human study showed measurable improvements after six weeks of using a platelet-derived exosome serum: less redness, fewer wrinkles, more even pigmentation, and a better complexion. However, that study had no control group and was not randomised, so a placebo effect cannot be ruled out. This is the only direct clinical evidence for exosomes in face creams or serums.
In animal research and cell studies the picture looks more promising. Stem-cell exosomes showed effects in mouse studies involving UV damage, eczema, and skin ageing. A combination of stem-cell exosomes with the green tea compound EGCG, delivered via microneedles, significantly reduced UV damage in mice. And exosomes loaded with NMN (a compound that supports cellular energy metabolism) slowed skin ageing in mice and restored the functioning of cellular mitochondria. None of these findings have yet been confirmed in humans.
For difficult-to-heal wounds, such as those associated with diabetes, more developed research models already exist. Specially engineered exosomes attached to a wound dressing promoted wound healing in mice more effectively than either component on its own. This is, however, a medical application, not ordinary skincare.
A structural problem is that there is no standard for how exosomes are produced and tested. This makes it difficult to compare studies with one another and means that consistent performance from product to product is not guaranteed. Reviews of the field acknowledge that the safety profile of exosomes appears favourable, but that manufacturing challenges and regulatory hurdles currently stand in the way of widespread use. Robust clinical trials are largely absent.
Evidence is based on one non-randomised human study (PMID 35689936), multiple animal and cell studies (PMID 41074154, 40369633, 40598314, 36775818), and two scientific reviews (PMID 34806432, 41580060). One expert overview article cites exosomes as an emerging therapy without its own clinical data (PMID 40889747).
Does resveratrol in skin cream actually do anything?
Resveratrol in skin cream demonstrably reaches the skin and has antioxidant activity, but whether it produces any visible effect as the sole active ingredient has not yet been proven. Combination products show promising results, but anyone buying a cream with resveratrol should be aware that the evidence for resveratrol itself remains thin.
Do peptides in skincare actually do anything?
Peptides in creams have a plausible mechanism on paper, but clinical evidence for topical use is thin. If you want to do something about skin ageing, oral collagen currently has the stronger foundation, though that too should be interpreted with some caution.
What actually works against skin aging?
Using sunscreen daily is the best-supported way to slow skin ageing, supplemented by not smoking, moderate alcohol consumption and sufficient sleep. Cosmetic options such as thread lifts and honey in creams have a weaker or not yet sufficiently proven basis and call for a critical weighing of the risks.
Does skin cycling actually work better for your skin?
Skin cycling as a protocol has not been scientifically tested, so no proven benefit can be attributed to it. Some of the ingredients it features, such as ceramide moisturisers and nicotinamide, do have solid evidence behind them individually.
Do polynucleotide or salmon DNA facial treatments actually work?
There are cautious indications that polynucleotide injections may improve the skin around the eyes, but well-controlled evidence is still lacking. If you are considering the treatment, ask your practitioner specifically about the supporting evidence and remain critical of commercial interests.
Do collagen supplements work against skin ageing?
Oral hydrolysed collagen measurably improves elasticity, hydration and wrinkles, after as little as 8 weeks at 2.5 to 5 grams per day. Look for 'collagen peptides' on the label and do not buy it for hair, nails or muscles.