Bianca Reyes

FTC sends refund checks over unproven supplement health claims

Does biotin actually help hair, skin and nails?

Vitamin D and immunity: what the trials actually show

Large randomized trials have tested whether vitamin D prevents respiratory infections — the answer is a modest effect mostly in people who started deficient, and no demonstrated benefit against colds in the general population.

NAC is back on supplement shelves. Here's what changed, and what didn't

The FDA confirmed in 2024 it does not object to NAC in dietary supplements, ending a four-year limbo — but the compound's efficacy evidence remains narrow, and the policy story is the real news.

Weigh-in reform in combat sports

Rapid weight cutting has documented health consequences; commissions and promotions have reformed weigh-in rules, and the evidence shows what the changes did and did not fix.

What to eat before morning training: fasted versus fed, and timing

The fasted-training debate, what carbohydrate before exercise does to performance, and how early risers can time a pre-training meal.