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Neither is an FDA-approved drug for human therapeutic indications

External urethral sphincter activity in diabetic rats

Supports neurotransmitter production: NAD+ is involved in the synthesis of serotonin, dopamine, and other neurotransmitters that regulate mood and cognitive function

Julin B, Shui I, Heaphy CM et al (2015) Circulating leukocyte telomere length and risk of overall and aggressive prostate cancer

Yes, both supplements can typically be taken daily, but it's important to consult a healthcare professional to determine the appropriate dosages for your individual needs

10.1016/j.neuroscience.2006.11.065 Neuroscience