Cinnamon one of the world?s favorite spices is a medicinal herb with more than 4 000 years of traditional use. Research has revealed that constituents in cinnamon bark called procyanidin Type-A polymers help support the body?s ability to metabolize glucose in a healthy way.* Doctor?s Best Cinnamon Extract contains Cinnulin PF? a patented water-soluble extract of cinnamon (species Cinnamomum burmannii) that contains Type-A polymers. Cinnulin PF? is a proprietary product of IN Ingredients Inc.* At Doctor?s Best we lead with science. Our products are backed by research and crafted using pure ingredients carefully sourced from around the globe. Since 1990 we have dedicated ourselves to providing highly effective nutritional supplements that enable you to live a healthier lifestyle. We want nothing more than to see you and your family thrive!