When 'More' Stops Working

The supplement aisle runs on a single promise — that bigger numbers are better — but past a point, "more" stops translating into more that your body actually keeps The neon-yellow urine after a big multivitamin is mostly riboflavin passing straight through; it's a daily receipt for the part you paid for and didn't absorb Absorption is dose-dependent: the fraction your body takes up tends to fall…