Use as part of your diet to support healthy blood sugar levels. Cinnamon, one of the world's most popular spices, is a medicinal herb with more than 4,000 years of traditional use. Research has found that compounds in cinnamon bark, called procyanidin type A polymers, support the body's ability to metabolize glucose in a healthy way. Doctor's Best Cinnamon Extract is Cinnulin PF®, a patented, water-soluble extract of cinnamon (species Cinnamomum burmannii) containing Type A polymers. Cinnulin PF® is a trademark of IN Ingredients, Inc. Use as part of your diet to help maintain healthy blood sugar levels.