By Hugo Francisco de Souza Reviewed by Susha Cheriyedath, M.Sc. Mar 31 2026 A new review suggests vitamin D does far more than support bones in early life, but says the strongest non-skeletal benefits still need firmer human evidence. Key takeaways Vitamin D is clearly important during the first 1,000 days for skeletal health, especially for preventing rickets and supporting early bone development. The review suggests that vitamin D may also influence immune, metabolic, and selected