How long to drink collagen can play an effect, mainly related to the body of the recipient, can not be generalized. The main role of collagen is to promote calcium absorption, enhance muscle strength and prevent osteoporosis; it can also inhibit tyrosinase activity in the body, reduce the content of pigment cells, play a role in hydration, increase skin permeability, lock skin moisture, keep the skin hydrated, enhance skin elasticity, delay aging, and can also lighten pigmentation and wrinkles. The actual effect is not the same because of the individual body and spleen and stomach absorption function. If you have a good absorption of collagen, you can see the effect in half a month or so; but if the absorption is poor, it may take a month or even longer. In addition, you need to be aware that collagen is good, but you can’t consume too much of it, otherwise it will easily lead to the accumulation of protein that can’t be absorbed.