Expert Interpretation: Caffeine, a common component of slimming cream, can improve heart rate, basal metabolic rate and lipase activity. Because of the cutin of the skin, it is rare to achieve the effect of fat consumption by smearing. Because the skin can absorb very little, and it needs a certain concentration to have an effect, usually 5 mg per kilogram of body weight, how can a slimming cream contain so much caffeine? Therefore, if you want to lose weight better, extend the exercise time appropriately and improve the intensity is the last word.