What’s up with Methylene Blue? Bryan Johnson’s latest longevity trend explained

Bryan Johnson’s blue urine sparks interest in methylene blue. It is used for anti-aging and brain function. Robert F. Kennedy Jr. also supports it. Methylene blue was first a textile dye. It is now used to treat malaria. It is also used for urinary infections. The FDA approves it for a blood disorder. Experts say it may improve memory.