You step back and take a look at your grandma. You can already see your power working. Her bad skin clears up and her face becomes less pale. You smile as you watch her regain her health. It didn't stop there though. Her wrinkles appeared to be less visible than before. As you continue to watch, you notice that your power does more to her than just give her health back, it seems to be making her younger. Your power continues to regress your grandma's age until it finally stops. What age did it stop at?