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Ácido nicotínico; Vitamina B3
Una deficiencia de niacina causa pelagra y los síntomas son, entre otros:
Las dosis altas de niacina pueden causar:
Incluso dosis normales pueden estar asociadas con enrojecimiento de la piel. Las nuevas formas del ácido nicotínico reducen este efecto secundario. La nicotinamida no causa estos efectos secundarios.
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