The main product of the Krebs cycle, also known as the citric acid cycle, is ATP, along with other high-energy molecules such as NADH and FADH2. This cycle plays a crucial role in cellular respiration by oxidizing acetyl-CoA derived from carbohydrates, fats, and proteins. The Krebs cycle occurs in the mitochondria of cells and contributes to the production of energy by transferring electrons to the electron transport chain, ultimately leading to the synthesis of more ATP through oxidative phosphorylation. This pathway is key for energy metabolism in organisms.