The dietary supplement nicotinamide riboside (NR), a form of vitamin B3, in studies has shown benefits related to cardiovascular, metabolic and neurological health. However, a recent study from the University of Missouri has found high intake of NR could actually increase the risk of developing a form of breast cancer that metastasizes to the brain.
https://doi.org/10.1016/j.bios.2022.114826 Source: University of Missouri
This was known long ago, but it is currently being be bombarded as a dr lobbied the fda to reclassify a similar supplement as a drug so he can sell. I don’t use either but the timing of the whole thing is extremely shady on the fda’s part. Seems like you can just buy them out after a certain point (like with the Alzheimer’s drug)