New Roots Herbal’s Vitamin D3 supplies the biologically active form of vitamin D. Vitamin D3 is critical for the absorption and regulation of calcium and phosphorus levels necessary for strong bones, teeth, and nails. The ability to synthesize adequate vitamin D3 diminishes with age. The many health problems that result from a deficiency of vitamin D3 include osteoporosis and seasonal affective disorder (SAD). Vitamin D3 would improve immunity and reduce the incidence of winter infections. These illnesses can be addressed with a daily supplementation of New Roots Herbal’s Vitamin D3.