Like many other members of the B-vitamin family, Niacin is well-known for its role in energy metabolism (breaking down substances in the body to yield energy). Actually, niacin plays a part in the energy metabolism of all cells in the body. Another benefit of water-soluble vitamin is its versatility.
Adenosine triphosphate (ATP) , the energy currency or coin of the cell pictured in Figfures 1 and 2, transfers energy from chemical bonds to endergonic (energy absorbing) reactions within the cell.nergy is stored in the covalent bonds between phosphates, with the greatest amount of energy (approximately 7 kcal/mole) in the bond between the second and third phosphate groups. This covalent bond is known as a pyrophosphate bond.
The electrons creating the orbital that is located the furthest away from the nucleus have the most energy. Orbitals closer to the nucleus have gradually and slightly less energy (See diagram below). At the atomic level, the electrons are orbiting the nucleus at the speed of light. But electrons can for various reasons also jump between orbitals, which requires energy to do so. If an electron jumps from an inner orbital to an outer higher energy orbital, the electron uses energy.