Sentinel Vitamin D3 400 IU is a dietary supplement containing vitamin D3 (cholecalciferol) in softgel form. Each softgel provides 400 IU of vitamin D3 to support bone health, calcium absorption, immune function and overall wellness. The supplement comes in an amber glass bottle containing softgel capsules for optimal absorption, as vitamin D3 is fat-soluble. This dosage is suitable for maintaining healthy vitamin D levels, especially for those with limited sun exposure or dietary restrictions. The bottle features a safety seal to ensure product freshness and quality. As with any supplement, it should be taken as directed by a healthcare professional.