There’s little evidence to imply that collagen can be absorbed topically (via a mask). For the most part, collagen molecules are simply too large to permeate the skin. When I did some digging, I found ...
Interestingly, retinoids have a rich history dating back a few decades. The experts further explain: "Tretinoin, under the brand name Retin-A, was the first retinoid" used as treatment for acne ...