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NCT04892136 (hair growth, Phase I/II, terminated 2023) clinicaltrials.gov

The simultaneous increase in NADP and decrease in NADPH act additively to increase G6PD activity by increasing the substrate drive on the reaction rate and decreasing product inhibition

Given side effects like nausea, a man with normal erectile function is unlikely to find the trade-off worthwhile

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It also boosts steroidogenic enzymes inside Leydig cells to produce more testosterone