Used in traditional eastern medicine for thousands of years, Bitter Orange contains several alkaloids such as synephrine that stimulate the body's beta-3 receptors. Activating these receptors boosts your metabolic rate and energy levels to help increase fat burning.
Bitter Orange also promotes the release of epinephrine and nor-epinephrine which boost mental energy and focus while indirectly helping to release stored body fat. Bitter Orange (synephrine) is thought to work synergistically with caffeine and other thermogenics as well.