Its nuanced, and getting it wrong can have catastrophic consequences for your results
You go in the emergency room, you have carbon monoxide poisoning, it'll give you methylene blue, and it helps your red blood cells displace the carbon monoxide and put oxygen there
The fundamental mechanism is the activation of phase II detoxification enzymes or antioxidase controlled by Nrf2/ARE, including the expression of NAD(P)H quinone dehydrogenase 1 (NQO1), GPX, and superoxide dismutase (SOD) (Truong et al., 2014)
[6] [8] FAQ Can you take NAD+ and glutathione together
P., & ELITE Research Group (2016)
If you want the strongest evidence per bite and transparent sourcing, this is the bottle to set on your counter first