Please choose the correct ending to complete the given sentence: Health: [header] How to use coenzyme 1 for health [title] Take nadh to fight fatigue. [step] People who suffer from energy-sapping disorders such as chronic fatigue syndrome and fibromyalgia may benefit from nadh supplements. Specifically, nadh is involved in the production of another chemical called atp that your cells need to produce energy.

Ending1: This physical cycle is called " crash build-up ", or the regulation of energy in the body. Research shows that although crash build-up occurs in babies and infants, it is not as permanent or dangerous for adults as it is for children. Ending2: [substeps] Oral and herbal supplements also are available, depending on the person's health. Talk to your doctor before trying nadh. Ending3: Talk to your doctor about taking nadh in a treatment regimen if you suffer from fatigue, especially chronic fatigue syndrome. [substeps] Your doctor may recommend taking niacin so that your body can make nadh. Ending4: It works through your body's immune system. Atp blockers are given to combat side effects like fatigue.

Answer format: ending1/ending2/ending3/ending4