12/23/2025
US, nearly 15 times too low!! Most people need 5,000 -10,000 iu a day
Vitamin D is a fat-soluble hormone that plays a critical role in many body systems. Deficiency is very common, especially in people with limited sun exposure.
Key benefits:
• Bone health: Enhances calcium and phosphorus absorption, helping prevent osteoporosis and fractures
• Immune support: Helps regulate immune responses and reduce infection risk
• Muscle strength & balance: Low levels are linked to muscle weakness and falls
• Mood & brain health: Associated with reduced risk of depression and seasonal affective symptoms
• Hormone & metabolic support: Plays a role in insulin sensitivity and inflammation regulation
• Cardiovascular health: Supports healthy blood pressure and vascular function
Vitamin D Sources
• Sunlight: UVB exposure to skin (often insufficient in winter or northern latitudes)
• Food sources: Fatty fish (salmon, sardines), egg yolks, fortified dairy and grass fed meat.
• Supplements: Vitamin D3 (cholecalciferol) is preferred with K2 and magnesium glycinate for best absorption
A Statistical Error in the Estimation of the Recommended Dietary Allowance for Vitamin D (2014)https://pmc.ncbi.nlm.nih.gov/articles/PMC4210929/US, nearly 15...