Unfortunately, collagen soup, powder, supplements, drinks, or skincare products do absolutely nothing to your skin. Our bodies cannot absorb the collagen we eat or apply to replenish the lost collagen in our skin as the molecules are too big to be able to enter our bloodstream or skin.
Every protein we eat needs to be broken down into amino acids before our body can absorb and benefit from its goodness. But we cannot know how much of the absorbed amino acid goes directly to the skin.