The best pre-workout supplements come down to caffeine, citrulline, and creatine at real doses. A dietitian decodes labels and the picks worth buying.

If you're searching for the best mushroom coffee, the honest answer is: most products in this category contain far less functional mushroom per cup than the doses used in clinical research, and some contain mushroom extracts with such low beta-glucan content that calling them functional is a stretch. This article breaks down the actual mushroom

If you're searching for the right rhodiola dosage, the short answer is: 200–680mg per day of a standardized extract (3% rosavins, 1% salidroside) is the range that showed up in successful human trials, but the dose your body responds to depends on extract quality, timing, and what you're taking it for. This article breaks down