In the pursuit of anti aging medications, drugs, remedies etc, it is very important to make sure that first, there is no harm. Methylene Blue is toxic and it surprises me that it is even been considered for this sort of application. There are significantly many more "anti-aging" remedies and treatments that are actually beneficial to the body without inducing a toxic reaction. A 3 sec google search resulted in the following links: https://scholar.google.com/scholar?q=Methylene+Blue+toxicity&hl=en&as_sdt=0&as_vis=1&oi=scholart&sa=X&ved=0ahUKEwjYrbSgvs3UAhUDyGMKHTMtAj8QgQMIJDAA

I would suggest caution.