Longevity ...  Methylene blue is an old pharmaceutical dye that is FDA-approved for a blood disorder called methemoglobinemia, but in recent years it has gained attention in longevity . and biohacking spaces for potential mitochondrial and neuroprotective effects. While early research suggests intriguing mechanisms, most longevity claims remain experimental. The longevity mechanism people are talking about starts with mitochondrial “electron shuttling” and ATP production. One of the main reasons methylene blue attracts longevity interest is its effect on mitochondria. Research suggests MB can: Accept and donate electrons in the electron transport chain Potentially bypass damaged areas Help maintain ATP production under stress  This is why you’ll often hear claims that it: increases cellular energy improves cognitive clarity mimics aspects of calorie restriction pathways Some studies even link MB to activation of energy-regulating pathways like SIRT1, which are ass......