Blackmores Vitamin D3 1000 IU assists healthy bone building. Vitamin D3 supports the absorption of dietary calcium which supports bone health. Vitamin D3 supports immune system health and muscle health. Blackmores Vitamin D3 1000 IU is a one-a-day dose of vitamin D3 to help absorption of calcium and a diet deficient in calcium can lead to osteoporosis in later life. - One-a-day dose - Assists healthy bone growth - Supports muscle strength, function and health - Vitamin D helps absorption of dietary calcium which supports bone health. A diet deficient in calcium can lead to osteoporosis in later life - Supports general health and wellbeing