A Growth Factor is a substance, usually a peptide, that signals your own body to produce, make, create, synthesize (they all mean the same thing!) more of something. Caire’s HA Growth Factor, the MAGIC ingredient in Theorem Serum Boost signals your own skin to make more HA. We all produce HA every day and use about 1/3 of our body’s supply every day. The challenge is that at age 30, you make 1% less a year and for women, starting around 40, you make a lot less year on year.   Soooo… while we’re not asking you to do any math, the bottom line is that anything you can do to get your skin to make more than it would otherwise is so helpful. A little teamwork makes the dream work!