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Over a period of time, cells that are exposed to continuous signaling can downregulate their receptors as a protective mechanism
What it has not done is progress through a regulated clinical-approval pathway
Hair follicle signaling
(I knew it was going to sting)
However, niacinamide at physiological doses (like those in prenatal vitamins or moderate supplements) is not known to be harmful
J Vet Pharmacol Therap
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