Guggul extract contains a plant sterol called guggulsterone, which appears to offer anti-tumor, anti-angiogenic and cholesterol-lowering actions, according to the Memorial Sloan-Kettering Cancer Center. Guggulsterone also seems to influence estrogen, pregnane and progesterone receptors. Guggul is thought to also stimulate thyroid gland function, but little scientific evidence supports this effect, notes the University of Pittsburgh Medical Center.
Although the exact function of guggul hasn’t been proved, the remedy appears to promote weight loss by affecting your thyroid to stimulate metabolism and other key bodily actions, says the University of Pittsburgh Medical Center. In addition to improving weight loss, guggul may also improve your mood. Guggul is especially effective in promoting weight loss when it’s taken with phosphate salts, tyrosine and hydroxycitrate, along with exercise, notes the University of Michigan Health System.