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That said, the cost may be justified by the level of research that goes into Tru Niagen, which has undergone more rigorous testing and quality control than many other NAD+ supplements on the market, including third-party testing, being manufactured in ISO-certified labs, and being backed by more than 45 peer-reviewed clinical studies

International Journal of Molecular Sciences, 19 (7), 1987.

Maharani A, Dawes P, Nazroo J, et al

The World Anti-Doping Agency (WADA) has placed restrictions on certain GHRH analogs and related compounds in competitive sports, underscoring the need for careful consideration of risks and compliance with applicable guidelines