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NMN is well tolerated in healthy participants who received 300, 600, or 900 mg per day for a total of 60 days 322,323 , with all NMN doses increasing blood NAD + levels, and no adverse events were observed

Results vary based on age, labs, health history, dosage, and consistency

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Then the dominoes: the LIFT-AD trial failed in September 2024, the Department of Justice settlement landed in January 2025, and the formal retractions of two foundational papers followed in April 2025

Biochim Biophys Acta Mol Basis Dis 1689(1):612 Ichikawa H et al (2007) Anticancer drugs designed by mother nature: ancient drugs but modern targets