Okay, who doesn't love a lemon bar? I mean really, they are so dang good, but loaded with sugar, processed white flour and more sugar. So being the baker that I am (NOT I am horrible at baking, this took me 3 times) I personally think this recipe is BOMB, no sugar or gluten, but yes lot of butter.
Collagen is more than a hype right now. It is something we ALL need in our diets every day because it is the most abundant protein in the body making up 70% of our protein in our skin. Unfortunately, when convenience foods were introduced we all stopped consuming the foods that contained these crucial nutrients. In nature is found exclusively in animal tissue, especially bones and connective tissue. Back when traditional recipes included the whole animal, bones, skin and all the tendons, there was no collagen issues!