Protein powder supplies a nutrient or bioactive compound intended to alter a defined physiological pathway. The relevant form, baseline status and product quality determine whether the proposed mechanism is clinically meaningful.
What it is, why people use it, the evidence, and what to know before trying it.
Known side effects, interactions and use limits from reviewed sources.
Protein powders may contain milk, soy or other allergens and can add sweeteners or contaminants. Kidney disease and medically prescribed protein restrictions require individualized guidance.