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Nascobal (Cyanocobalamin, USP) Nasal Spray 500 mcg/spray 0.125 mL [Label]

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According to the United States Food and Drug Administration (FDA), dietary supplements are not monitored for safety or efficacy before hitting the market [6]

Carvalho, E., Kotani, K., Peroni, O

The energy, metabolism, and liver support they provide makes every other component of a weight loss program more effective