CYP17A1 and nutritional disorder: Persistent respiratory inflammation and incidents of hypoxia, as well as nutritional disorders, may also modify the redox state of nicotinamide adenine dinucleotide (phosphates) (NADH/NAD+ or NADPH/NADP+), cofactors involved in many enzymatic reactions of oxidation/reduction, among others, glycolysis, the Krebs cycle, fatty acid oxidation, and the function of many steroid hormone biosynthesis enzymes, such as CYP17, 3βHSD, SRD5A or 17α-HSD and 17β-HSD (35–37).