Our D-3 ActivMelt Instant Dissolve Table 5000 IU (125 mcg) is a micro tablet designed to support the maintenance of healthy bones and teeth. An essential vitamin, D-3 influences how your body absorbs calcium and phosphorus. Though you can get vitamin D from the sun, nowadays most of our time is spent indoors, which makes it harder to get D-3 naturally. Vitamin D-3 supports a healthy immune system. Our ActivMelt technology allows for quick and easy digestion, and the lemon lime flavor makes it a treat to take!