Synephrine From Advantra Z.
Primaforce Syneburn - Advantra Z Bitter Orange Extract 10 mg - 180 Capsules Boosts Metabolism: Increase resting metabolic rate which can enhance weight loss. Synephrine From Advantra Z: Advantra Z is a brand name of bitter orange, a popular diet supplement ingredient that has been shown to increase metabolism, enhance weight loss, and reduce body fat. Synephrine is a stimulant similar to caffeine and ephedrine so it can help burn fat, suppress appetite, and increase energy.Synephrine can be taken with caffeine to optimize fat burning.