Skip to main content

Cholecalciferol

How Much Vitamin D Do You Actually Need? The Complete Evidence-Based Guide

A comprehensive deep dive into vitamin D — covering optimal blood levels, the real deficiency epidemic, D3 vs D2, sunlight synthesis, clinical evidence for bone, immune, mood, and cancer outcomes, toxicity safety ceilings, K2 and magnesium co-supplementation, drug interactions, and precise dosing by population. Based on peer-reviewed research, not marketing.