Bernard O'Shea: Why Riboflavin is the secret agent of vitamins 

Bernard O'Shea, comedian, columnist and riboflavin aficionado.

I thought I was taking B12 but accidentally popped Riboflavin for three months — now I’ve got stronger nails, fewer headaches, and a weird respect for cereal boxes.

Have you ever found yourself so deep into a routine that autopilot mode takes over? That was me with my vitamins. I buy Vitamin B12 religiously every month — except, as it turns out, I’ve been popping Vitamin B2 (Riboflavin) for the past three months. Yes, I’ve unknowingly been conducting a one-man nutritional experiment.