Marine collagen is all the rage in anti-aging. What does that mean for fish?

News Snapshot:

It may come as a scoop of white powder to add to a latte or smoothie, promising to help achy joints and sagging skin. Or, as an ingredient in face masks and moisturizers, claiming to offer a youthful glow. It's marine collagen, a buzzword in beauty and supplement circles, often derived from fish skin, scales and bones, or other animals like sponges and sea cucumbers, depending on the product. The global market for marine collagen is already estimated at more than $1 billion US and growing, driven by demand to look and feel younger. It's promoted as an alternative to...