Nature’s Bounty Optimal Solutions Metabolism Booster is a 100% drug-free supplement designed to promote abdominal fat loss and boost fat metabolism. While weight gain is a challenge for many adults, this metabolism boost supplement with plant-based active ingredients can help you manage your weight safely and effectively when used in conjunction with a healthy diet and exercise program. Nature’s Bounty Optimal Solutions Metabolism Booster features two unique, clinically studied ingredients with different benefits for weight management and a healthy metabolism. A blend of citrus extracts helps to boost fat metabolism and reduce waist circumference. Black Ginger Extract helps to promote abdominal fat loss.