What It Actually Is
Cinnamon bark extract is concentrated from the bark of cinnamon trees, standardized to contain the compounds associated with the spice's studied metabolic effects.
What Research Generally Shows
Cinnamon has a reasonable research base, with some studies showing modest improvements in fasting glucose and insulin sensitivity, though results are mixed and appear dose-dependent.
The Honest Gap
GL-Defend doesn't disclose the specific amount of Cinnamon Bark Extract included.