The useless Jinyuan Muscle Brightening and Firming Cream is a beauty product, which claims to improve skin problems such as obesity lines and stretch marks, but it has no effect. Obesity lines are caused by the destruction of elastic fibers and collagen during the long-term stretching and contraction of the skin, thus producing lines on the skin. Beauty products claim to improve obesity lines, but the actual effect is not clear. Therefore, Jinyuan Muscle Brightening and Firming Cream has no effect on obese lines.