Ingestible Beauty Meets Muscles: Bulletproof Upgraded Collagen Protein Powder

Touted on the sides of sundry beauty packages that litter our cabinets, collagen has long been heralded the miracle of youth. It's been packed into vitamins, creams and serums (and beer!) but we’re only just beginning to add it to our favorite smoothies. Are taut skin, defined muscles and the glory of our youth really just a tablespoon of collagen away?