Very often people blame their weight gain on a slow metabolism. Metabolism is a term that describes all the chemical reactions that take place in the body such as breathing, repairing of cells and digesting food. When using the word metabolism people also refer to the metabolic rate, the energy (calories) the body needs a day. Age, gender, genes, your microbiome (the type and number of bacteria living in the gut) and body size all play a role in the…