GET YOUR ESSENTIAL DAILY DOSE: The Endocrine Society recommends 1,000-2,000IU of Vitamin D per day to maintain healthy bones, teeth, muscles and immune function. MOST ACTIVE FORM: NatureWise Vitamin D3 delivers the same biologically active form of Vitamin D that is naturally produced in the body from sunlight — without the risky UVB exposure. SUPERIOR ABSORPTION: Vitamin D is a fat-soluble vitamin that requires dietary fat for the body to absorb it. Our Vitamin D3 is delivered in certified organic olive oil, a healthy fat source that improves bioavailability. PURE & NATURAL: NatureWise Vitamin D3 is all natural, non-GMO, and gluten free with no artificial additives, fillers or binders. We respect the intelligence of nature — and the intelligence of our customers. UNCOMPROMISING QUALITY: All NatureWise supplements are Manufactured in USA-based facilities that comply to the strictest cGMP standards and undergo rigorous testing by third party labs to ensure the highest quality and purity. During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when provided.