293 people all receiving similar #immunotherapy for skin cancer showed no significant immune boost from taking a probiotic. But eating a #diet rich in #fiber (#prebiotics) was correlated to survival. PROBIOTICS ARE BIG business — they are the third most common supplement, after vitamins and minerals. Some formulas are touted as being good for digestion and the immune system, and they are particularly popular with people worried about immunity. But a new survey of dietary habi