Most Effective Weight Loss Injection . Saxenda was recently approved by the fda as effective and safe, given that the patient meets certain criteria and conditions. Lipotropic injections could promote fat loss in the body, but they only work when combined with a healthy lifestyle that promotes weight loss. Woman gets 100 silicone injections to have the world’s from uk.lifestyle.yahoo.com This new treatment has led to significant weight loss in clinical trials; Expected to be available in the us this month. In addition to recommended diet and physical activity, liraglutide consistently resulted in a 4 to 6 kg weight loss, with a greater proportion of patients achieving at least 5 and 10% weight loss compared with placebo.