What It Actually Is
Bitter melon (Momordica charantia) is a tropical vine with a distinctively bitter fruit, used for generations in traditional Asian, African, and Caribbean medicine.
What Research Generally Shows
Bitter melon contains several compounds studied for insulin-like activity in the body, and has a reasonable research base for supporting glucose utilization, though results across studies are mixed.
The Honest Gap
GL-Defend doesn't disclose the specific amount of Bitter Melon Extract included.