I have some of this in the fridge. I take a drop of it from time to time in the morning if I have a case of especially thick morning brain fog.
I find it to be helpful in those circumstances.
But I don’t like to take it consistantly.
Methylene Blue seems like something worth keeping around the house.
Three weeks ago I didn’t know it existed, until it was recommended for recovery from covid vaccine problems:
https://covid19criticalcare.com/wp-content/uploads/2022/12/I-RECOVER-Post-Vaccine-Protocol.pdf