Pure and High Grade. HPLC Tested and Certified. Manufactured in A cGMP Facility. 1,000IU per Serving. SAN's Vitamin D3 Softgels Supply Recommended Levels of This Key Vitamin in a Highly-Absorbable Liquid Softgel Form. Vitamin D Is Normally Obtained From The Diet Or Produced By The Skin Form The Ultraviolet Energy Or The Sun. However, It Is Not Abundant In Food. As More People Avoid Sun Exposure, Vitamin D Supplementation Becomes Even More Necessary To Ensure That Your Body Receives An Adequate Supply.