Mega Vitamin D3 (40000 IU x 30 Caps @ 17.9 cent per 1000IU)Many studies show that high levels of Vitamin D3 (cholecalciferol) boosts immunity and mood, strengthens bones and muscles, and improves lung, kidney, brain, nerve and heart health, as well as fighting osteoporosis, diabetes, heart disease and cancer. Most people nowadays do not get enough sun exposure to activate Vitamin D into Vitamin D3 in order to bring Vitamin D blood levels above 20ng ml. You can do a Vitamin D test without prescription at any