In Imedeen: sheep placenta vs collagen

LOLi had never use any collagen or sheep placenta product. need some advice from those with experience.and do you think product like estime is better then pure collagen powder/ drink? if i can only afford to buy either estime/imedeen type of product or pure collagen powder or sheep placenta..which one should i take?can i take all 3 at a time? (just in case im richer in a near future) kahaha im 27 ...Imedeen