expertnutrition.com
Liquid Emulsified Vitamin D3 | 1 fl oz (29.57 ml) - Online Health Store | Vitamins Online | Supplements Online Expert Nutrition Center
Vitamin D3 can be synthesized by humans in the skin upon exposure to ultraviolet-B (UVB) radiation from sunlight. But, due to the winter season, weather conditions, and sun block, the bodys ability to produce optimal vitamin D levels may be