Personally, I like Yan Ruyu's collagen oral liquid very much. Why do you like it? Mainly because after drinking for a while, the effect is very obvious. At first, Bian Xiao's skin condition was very bad. Her face was pitted and there were some pimples. Later, under the recommendation of a friend, I drank Yan Ruyu's collagen with a feeling of trying, and I really felt a great change. First, I feel sleepy and sleepy every time I drink it, and my sleep quality has improved. Secondly, I found that the acne on my face gradually became smaller, and then it really disappeared completely, and my pores also changed. The above is my personal answer about whether collagen drinks are effective or not. Generally speaking, if the collagen drink you choose has a good reputation and high recognition in the market, then you can get a firmer and more delicate skin condition and better sleep quality by taking one or two bottles a day.