Metabolic Muscle — Creatine Monohydrate

The most-studied supplement in human history, dosed the way the research does — 5 g of pure creatine monohydrate, nothing else — and the single best defense against losing muscle while you lose weight.

Single-ingredient and pure. When calorie intake drops, the body burns lean tissue alongside fat; creatine helps protect it, supporting strength, endurance, and athletic performance. The evidence also runs deep for cognition and brain energy — and it's most under-utilized in the women over 40 who'd benefit most.

Who it's for: anyone losing weight, anyone over 40, anyone strength training, anyone protecting brain and muscle function with age.

How to use: 1 scoop (5 g) daily in water or a smoothie.