Collagen usually comes from animals, and the source impacts how your body absorbs it. Marine collagen, from fish, is known for its quick absorption and skin-friendly benefits. Bovine collagen, from cows, contains both Type I and III, making it great for skin, hair, and nails. Porcine (pig-based) is also common. If you’re vegetarian or allergic to fish, always check the label. Also, beware of brands claiming “plant-based collagen”—plants do not contain collagen. They might support your body’s collagen production, but they don’t provide the actual protein.
