Vitamin D Supplementation Slows Aging, Reduces Autoimmune Markers in 1000 Adults

Recent research highlights the significant role of vitamin D in slowing biological aging and managing chronic diseases. A Harvard study demonstrated that daily supplementation with 2,000 IU of vitamin D over four years significantly reduced telomere shortening, a key marker of aging, while also lowering inflammation and autoimmune disease risk. However, experts caution against uncontrolled vitamin D supplementation, noting that excessive intake can cause harmful health effects such as hypervitaminosis D, emphasizing the importance of obtaining vitamin D primarily through sunlight and diet. Emerging studies also reveal complex immune-related mechanisms contributing to vitamin D deficiency, particularly in children, where immune dysfunction can impair vitamin D metabolism despite adequate nutrition and sun exposure. Furthermore, vitamin D levels are linked to insulin resistance in patients with Metabolic Associated Fatty Liver Disease (MAFLD), suggesting its broader influence on metabolic health and potential as a therapeutic target. These findings collectively underscore vitamin D’s multifaceted impact on aging, immune function, and metabolic disorders, but also highlight the need for balanced, medically guided supplementation.