Sentinel Vitamin D 400 IU is a dietary supplement containing 100 softgel capsules that provide essential vitamin D to support bone health, calcium absorption, and immune system function. Each softgel delivers a daily dose of 400 IU (10 mcg) of vitamin D in an easily absorbable form. The supplement comes in a dark amber glass bottle with a safety seal to protect the product integrity. Vitamin D is a fat-soluble vitamin that plays a crucial role in maintaining healthy bones and teeth by promoting calcium absorption. This dosage is suitable for general maintenance of vitamin D levels, particularly for those with limited sun exposure or dietary restrictions. The softgel format helps optimize absorption since vitamin D is fat-soluble.