FASTIN-XR – Weight Loss AidFASTIN XR Weight Loss Aid There is no doubt that Fastin XR is a remarkable feel good nutritional product, whose ingredients produce rapid stimulant effects that make it enjoyable to take. Senegalia Berlandieri and other potent stimulants are utilized in Fastin XR to promote extreme energy, a great mood, and weight loss. + In the United States, the demand for Fastin is now growing faster than the demand for any other stimulant weight loss product.