Evidence-based guide to immune support vitamins for adults: Vitamin C (75–2,000 mg), Zinc (8–11 mg), Vitamin D (600–4,000 IU). Clinical data shows 20–40% symptom reduction.

Evidence-based guide to the best immune system supplements combining vitamin C, zinc, probiotics, and omega-3s. Compare brands and learn what works.

Discover the 7 worst foods for gut health—ultra-processed items, artificial sweeteners, and high-sugar foods that damage your microbiome.