Plant stem cells sound like science fiction. Here is what is actually in the bottle. No serum contains living stem cells, and any brand telling you otherwise is selling the word rather than the ingredient. What this serum contains is green tea stem cell culture, one of the most antioxidant-rich plant extracts available, paired with a peptide complex that signals your skin to firm itself. The green tea protects. The peptides do the structural work. Together they support firmer, smoother, more even-looking skin without the irritation of retinol. What's Inside Green tea stem cell culture rich in polyphenols, which defend against the daily oxidative stress that breaks down collagen Peptide complex that signals your skin to produce more collagen, the same category of gentle firming active found in our copper peptide range Lightweight hydrating base that absorbs fully and layers cleanly under a balm, moisturizer or SPF Why It Works / Who It's For Gentle enough for daily use. No peeling, no purge period, no adjustment phase, which matters if retinol has burned you before Built for mature skin that has lost firmness and looks dull or uneven rather than simply dry Layers well. Use it before your tallow balm so the actives go on first and the lipids seal them in Honest timeline: hydration and smoothness show up in the first couple of weeks. Firmness is a slower build, usually 8 to 12 weeks of consistent use, because that is how collagen actually works How to use: Apply a few drops to clean skin morning or night, before moisturizer. If you use it in the morning, always follow with sunscreen.