Sentinel Vitamin D3 400 IU is a dietary supplement containing 100 softgel capsules that provide a daily dose of vitamin D3 (cholecalciferol). This supplement supports bone health, calcium absorption, immune function, and muscle health through an easily absorbable softgel format. The supplement comes in a dark amber glass bottle with a tamper-evident seal to protect the contents and ensure freshness. Each softgel provides 400 IU (10 mcg) of vitamin D3, which is particularly beneficial for individuals with limited sun exposure or those needing to maintain healthy vitamin D levels. The softgel format is designed for optimal absorption since vitamin D3 is fat-soluble. When taken as directed, the 100-count bottle provides a 100-day supply.