NADPH is a crucial cofactor for assembling fat and is used to fight or create reactive oxygen species.

“and so nadph is really to me second only to atp a master energetic building material and it's the building material that's used for example to assemble fat it's the most important one so as you take pieces two carbon pieces from carbohydrate and want to put them together to make fat you keep dumping in electrical energy in the form of nadph and then eph is used in all sorts of other really interesting ways to fight reactive oxygen species it's also used if you're trying to kill bacteria to intentionally make reactive oxygen species”