My freshman-year dorm mate, a Paris Hilton lookalike who hailed from a wealthy Northern California suburb, was very clued into the fish oil craze of the early 2000s. Each day, she choked down one of those amber, egg-shaped pills to fortify her French manicure and color-treated tresses. It was, as far as I can remember, my first introduction to the idea of beauty supplements. Fish oil has fallen out of favor since then, clearing the way for biotin to take over as today’s beauty buzzword of note, but I remain as skeptical of the latter as I was of the