Americans are not alone in their futile quest for beauty. There's currently a collagen craze sweeping Japan in the form of "anti-ageing" restaurants devoted to serving collagen-rich foods such as pig trotters, shark skin, and hot pots filled with vegetables and clear chunks of translucent, tasteless collagen. Several Japanese nutrition scientists scoff at the idea that ingesting collagen has any more benefit than eating any kind of protein but that's not stopping gaggles of women from flocking to these beauty bistros.