The genetic aspect is quite small. People vastly over estimate the concept of a 'fast metabolism' or a 'slow metabolism', it's more fiction than fact. The fact

The genetic aspect is quite small. People vastly over estimate the concept of a 'fast metabolism' or a 'slow metabolism', it's more fiction than fact. The fact is calories in and calories out. Despite that, losing weight is not easy. It is not trivial or simple. It takes consistent hard work over many months. Making wishy-washy excuses for some people does not solve the problem.