Why do some people never gain weight no matter how much meat they eat, while others gain weight easily by just eating a little more rice? Why do some people try to lose weight by being careful and eating less, yet still see their weight increase? One of the reasons is due to differences in blood types. In other words, a person's blood type determines how their body utilizes different foods. The cause of this phenomenon is clearly related to an individual's genetic characteristics, but among these factors, blood type stands out the most prominently. People with different blood types can achieve faster and more significant weight loss results by referring to the following relevant food recommendations.