Through these mechanisms, naringin also works synergistically with synephrine and hesperidin to further boost your metabolism. (legionathletics.com)
From all the clinical trials that I've looked at, there are several studies that have demonstrated the effectiveness of synephrine for weight loss, and in cases where it was effective, it involved very high doses. (bodybuildingforyou.com)
Caffeine Anhydrous (180 mg), Synephrine HCl (25 mg), Hordenine HCl (25 mg), & L - Theanine (90 mg): Work synergistically to boost cognition, energy, and fat loss by increasing metabolic rate. (shop.jackedfactory.com)