Cellular NAD+ levels decline with age and metabolic stress, which has prompted interest in raising them through precursors or direct administration for energy, metabolic and longevity goals [11]
Animal studies showed thyroid C-cell tumors at exposures much higher than clinical doses
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*Correspondence: Irene Mattiola, [email protected] These authors have contributed equally to this work Disclaimer All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers
