Non-GMO 100% Vegan Dietary Supplement 500 mg Per Capsule Whole Bark Lab Verified Discussion: Native to Sri Lanka, cinnamon bark is one of the world's most popular and treasured spices. Cinnamon bark has a long history of use as both a spice and a medicine dating back over 4,000 years. Cinnamon bark may provide nutritive support for healthy digestive function and overall blood sugar health.