Malus Domestica Fruit Cell Culture
If you have already heard of the "plant stem cells trend" in beauty products you probably know about this guy as it was the first ingredient based on plant stem cells on the cosmetic market. It's a liposomal preparation of apple stem cells but not just any apples. It comes from the rare swiss apple called "Uttwiler Spätlauber" (btw, the manufacturer is also Swiss) and the stem cells are claimed to be rich in epigenetic factors and metabolites, which might support the longevity of skin cells.
As for now, we only have the claims of the manufacturer and those are also largely based on in-vitro tests (made in the lab and might or might not translate to real skin). Mibelle (the Swiss manufacturer) did one in-vivo (made on real people) study with 20 women that found that a 2% Malus Domestica Fruit Cell Culture cream applied twice daily decreased wrinkle depth of the crow's feet area by 15% in 4 weeks.