Ultra Fast Keto Boost Avoid any over the counter weight loss product that has ingredients that are not approved by the FDA (Food and Drug Administration). Examples of these products include ma huang, ephedrine or ephedra, white willow (salicin), and guarana. These products have no proof for effective weight loss and they have a lot of harmful side effects. For instance, ephedra is linked to side effects like seizures, stroke, heart attack, and death..