collagen drink is expensive and overall it's just a protein.. the protein goes inside the body and it will be utilised on priority parts eg. heart, brain, liver, kidneys, etc.. so mostly what u drink can't reach until ur skin.

our body can produce own collagen if u have enough of protein and Vit C.. dun waste ur money on collagen for protein only!! and of cz own production is way better than any drink or injection..