It is a fact that due to genetic advantage, some people are inclined to stay more fit and slim than other people. Its reason is that they are more disciplined to say ‘No’ to extra food. On the other hand, the heavier people have such genes that allow them to increase their body weight. In order to get an idea about this fact, Cambridge University has conducted research on almost 2,000 people. The BMI of these 2,000 people was less than 18.
