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.
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.
The fasted-training debate, what carbohydrate before exercise does to performance, and how early risers can time a pre-training meal.
RED-S and low energy availability describe the same core problem: fueling that does not cover training plus basic physiology. Here are the documented markers.
The classic week-long depletion protocol is obsolete. Modern carbohydrate loading takes one to three days, and the trials show who benefits and who does not.
Endurance training raises iron losses in several documented ways. What the research says about who gets screened, and what low ferritin means.