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NAD+ is a coenzyme found in every cell that helps convert nutrients into energy

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Moreover, penile growth involved not only androgen-dependent processes but also some independent procedures 17,19,55 that 6/13 individual steps for human penile development and 5/11 for mice were reported to be androgen-independent 55 , while these nonandrogenic hormones like thyroxin, glucocorticoids or growth hormone might not be corrected simply by testosterone administration 56