Support your active lifestyle with Vitamin D3 which helps to maintain muscle function and keep your bones healthy. Each capsule from Swanson Health is packed with 50µg of vitamin D and also helps to support the immune system - especially handy in the winter months when your natural vitamin D intake may be low due to a reduced exposure to sunlight. Support your active lifestyle with Vitamin D3 which helps to maintain muscle function and keep your bones healthy. Each capsule from Swanson Health is packed with 50µg of vitamin D and also helps to support the immune system - especially handy in the winter months when your natural vitamin D intake may be low due to less sunshine. 50µg of vitamin D per capsule. Helps maintain muscle function. Helps maintain healthy bones. Supports a healthy immune system. Consider using during periods of reduced exposure to sunlight. 250 capsules per pack High Potency Vitamin D-3 2000IU contributes to the maintenance of normal bones, muscle function and the function of the immune system. Go for it!