You already know vitamin D is the "sunshine vitamin," synthesized by the body when your skin is exposed to the sun's rays. But too little sun means you may not be getting enough of this important nutrient. Solaray High Potency Vitamin D-3 provides the same form of vitamin D your body generates from the sun for an extra high dose of shining health. Our bioavailable Vitamin D-3 can help support calcium absorption, which in turn means support for strong bones, healthy cardiovascular, immune and liver function, skin health, and much more! Lab tested for potency and purity, our High Potency Vitamin D-3 offers 10,000 IUs in a quality, well-crafted supplement that carries the Solaray name. That's the only guarantee you'll need for your glowing health!