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Could someone answer either of these questions for me.both the sudden drop in efficacy ,if there is one,and the later observation

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Gastrointestinal disturbance, Drowsiness, Dizzy sensation, Blurred vision, Abnormal movements of the eye, Tremors, Allergic skin rash Niacinamide Uses Niacinamide is used as a nutritional supplement in the treatment of nutritional deficiencies How it Works Niacinamide provides essential nutrients for patients suffering with niacin deficiencies

Moreover, KPV is also recognized as a natural antimicrobial peptide

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