Thorne Vitamin D-5000 Capsules provide 5000 IU of high-quality Vitamin D3 per capsule to support healthy bones, teeth, muscles, immune function, cardiovascular health, and overall vitamin D status. Vitamin D3 is the preferred form of vitamin D because it is generally more effective than Vitamin D2 at raising and maintaining healthy vitamin D levels in the body. Vitamin D plays an important role in enhancing calcium absorption and retention, helping maintain bone strength and normal muscle function while also contributing to healthy immune and cardiovascular function. It also supports brain health and normal neuromuscular activity. This higher-strength formula is particularly suitable for individuals with increased vitamin D requirements or limited sun exposure when supplementation has been recommended based on individual needs. The formula contains no lactose or added preservatives such as BHT, BHA, sodium benzoate, or sorbic acid and is NSF Certified for Sports.