The $70 billion beauty supplement industry certainly wants you to think so. This week we dig into collagen, biotin, hyaluronic acid, and those $90 greens powders everyone's suddenly drinking, tracing the history from Lydia Pinkham's 19th-century vegetable compound to today's $60 Moon Juice dusts. We break down what the research actually says about "ingestible beauty" (and, crucially, who funded it), why high-dose biotin might give your doctor an unwelcome surprise, and the psychology of why we keep buying products that promise to fix us from the inside out. Also on the docket: the rise of "preventative Botox" among people under 30, the gut-skin axis (real science, grifty applications), and what actually supports skin, hair, and nail health, spoiler, it's boring. If you've ever wondered whether that greens powder is doing anything besides lightening your wallet, this one's for you. This episode is brought to you by: Tailwind Nutrition – Sports nutrition without the BS. Code YOURDIET20 for 20% off at tailwindnutrition.com Osmia – Small-batch skincare made by a doctor who reads the research. Code YDS20 at osmiaorganics.com Janji – Running gear with purpose. Code YDS at janji.com Microcosm Coaching – Coaches who get endurance athletes. Free consultation at microcosmcoaching.com