Human stem cells are so special because they have the ability to become any type of cell. They're generally derived from human cells and reproduced in a lab.
The thought behind using stem cells in skin care is that they can become collagen or elastin – whatever your skin needs to look younger. As we age, our stem cells don't function as well. By applying the ingredient topically, you can rejuvenate your skin. "Stem cells are signaling molecules that encourage your cells to produce collagen and elastin and stimulate fibroblasts," explains New York dermatologist Elizabeth Hale, MD.
Lifeline Recovery Night Moisture Serum , contains non-embryonic stem cells – so there's no ethical question about human embryos in your moisturizer. An independent study showed that skin was 73 percent firmer after three months of using the product.