Discover how your body produces vitamin D from sunlight - the biochemical process, factors affecting absorption (skin tone, latitude, age), and why supplements are often essential. Learn safe sun exposure guidelines and deficiency symptoms.

Discover overlooked vitamin D deficiency causes beyond sunlight exposure - gut issues, medication effects, genetic factors, weight impacts and testing pitfalls. Science-backed solutions included.

Comprehensive guide on gaining vitamin D effectively through sunlight exposure, dietary sources, and supplements. Learn location-specific sun tips, absorption-boosting strategies, and safe dosing for deficiency correction.

Complete guide to vitamin D levels: Discover optimal ranges by age, testing methods, deficiency symptoms, and science-backed strategies to achieve healthy levels. Includes comparison of medical guidelines.

Evidence-based guide to choosing vitamin D supplements: D3 vs D2 comparison, optimal dosing by weight/deficiency, top-tested brands, and critical mistakes to avoid. Learn how to optimize absorption.