Xenadrine RFA-1 Review Xenadrine RFA-1 has been one of the most popular ephedra products used in the battle of the bulge. With 10mg of ephedra per 1 capsule serving, many people have achieved their weight loss goals using this product. What ingredients are in Xenadrine RFA-1? 335 mg Mahuang 910 mg Guarana 105 mg White Willow Bark 100 mg L-Carnitine 80 mg L-Tyrosine 125 mg Citrus Aurantium (Bitter Orange) 50 mg Ginger Root 40 mg Vitamin B5 Xenadrine RFA-1 is an excellent thermogenic supplement. It is used to incerease calorie burn by speeding up the metabolism. It increases energy and suppresses appetite, all while preserving precious lean muscle tissue which is difficult to do while dieting alone. Since finding Xenadrine RFA-1 has become increasingly difficult, more and more people are chosing to purchase Ultra Lean. Ultra Lean offers a great energy boost and appetite suppression while maintaining lean muscle mass.