It is said that coffee causes cancer because it contains acrylamide. The risk of cancer only occurs when the human body consumes 2.6 micrograms to 16 micrograms of acrylamide per kilogram of body weight per day. Based on this calculation, a person weighing 55 kg has a daily tolerance of acrylamide of 143 micrograms. The average acrylamide content in a 160ml cup of coffee is 0.45 micrograms, and you need to drink at least 318 cups a day to cause cancer risks.