From very long time scientists have been working on several theses behind the appearance of cellular life on Earth. The most important fact is all these theses rely on a set of complex Biochemical processes known as the metabolic pathway. Krebs cycle is one of the most important metabolic pathways among all.
In the context of medicine, health or physical fitness, weight loss refers to a reduction of body weight resulting from voluntary (diet and exercise) or involuntary (illness) circumstances. Most of the weight loss arises due to the loss of body fat.