Evidence-based guide to vitamins D, B12, K2, E and C for older adults — benefits, dosages, safety, side effects, and product selection.

Five adaptogens athletes can use to lower cortisol, boost endurance, speed recovery, and improve sleep—plus evidence-based doses and safety notes.

Essential vitamins for students—B-complex, D, C, and E—support focus, mood, immunity and energy; includes dosages, safety tips, and product selection advice.

Most teens get enough protein from food; supplements may help athletes or restricted diets but can have contamination, sugar, and overuse risks.

Evidence-based guide to B complex, C, D, and E supplements: benefits, dosages, risks, and selection tips for busy professionals.