Once injected into the skin, Botox is absorbed into the body. The protein itself is digested just like any other food you eat. However, because it’s a large protein molecule, this process takes several weeks.
At first, it goes to work immediately causing the temporary reduction of facial wrinkles. Then as time passes and more protein molecules are absorbed into your body, their effects add up and you see a continued improvement in your wrinkles. Eventually, all of the Botox molecules have been absorbed into your body, but it still takes several weeks to reach this point.