Nature's Bounty Vitamin D3 1000 IU is a dietary supplement containing 120 softgel capsules. Each softgel provides 25 mcg (1000 IU) of vitamin D3, which supports bone strength and helps maintain a healthy immune system. The easy-to-swallow softgels are designed for optimal absorption. This supplement comes in a green bottle with the trusted Nature's Bounty branding. Vitamin D3 (cholecalciferol) is particularly important for individuals with limited sun exposure or those looking to maintain healthy vitamin D levels. The softgel format is ideal since vitamin D3 is fat-soluble, allowing for better absorption. The bottle contains a 120-day supply when taken as directed at one softgel daily.