About 42% of US adults have a vitamin D deficiency, and that rate is even higher for obese individuals or those who belong to a minority race. This critical hormone plays an important role in bone, joint and immune health, as well as a balanced mood. With LongeviD₃™, we use reindeer lichen to provide you with a clean, potent source of vitamin D3, and we don't stop there. Adaptogens, a unique probiotic and other mineral-rich herbs are also included for a daily boost to your overall nutrition.