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Over-the-Counter Energy Supplements: Often rely on high doses of caffeine or temporary stimulants
But theres hope
Rather than directly supplying NAD+ precursors (like NMN or NR), it works by blocking an enzyme that consumes nicotinamide, theoretically preserving the substrate pool for endogenous NAD+ production
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Genetic factors may also play a role
Injections or vitamin drips are also offered by naturopathic doctors and spas promising instant results
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