Small molecule
Methylene blue (methylthioninium chloride) is an FDA-approved medication (trade names Provayblue, Proveblue) for the treatment of methemoglobinemia. It is one of the oldest synthetic medicines, first synthesized in 1876. In recent years, it has gained attention in biohacking communities for proposed cognitive enhancement and mitochondrial function benefits at low doses. The FDA-approved formulation is prescription-only; non-pharmaceutical-grade products sold online raise significant quality and purity concerns.
Clearly distinguish FDA-approved pharmaceutical methylene blue (for methemoglobinemia) from biohacking/cognitive enhancement use, which is off-label and unsupported by approved labeling. Do not publish dosing protocols or sourcing instructions. Track quality and purity concerns from non-pharma sources.
Methylene blue is FDA-approved for the treatment of methemoglobinemia, available as prescription-only Provayblue and Proveblue (FDA NDA 020226).
Preclinical research has explored methylene blue's effects on mitochondrial respiration, with studies suggesting it may enhance mitochondrial function and provide neuroprotection in animal models (Biochem Pharmacol, 2014).
A study on chronic cerebral hypoperfusion found therapeutic benefits of methylene blue on cognitive impairment in animal models (J Alzheimers Dis, 2014).
Non-pharmaceutical-grade methylene blue products sold online may contain impurities including heavy metals. The FDA-approved injectable formulation is manufactured to pharmaceutical standards, unlike chemical-grade or research-grade products marketed to biohackers.
Evidence level: Primary regulatory
Sources: U.S. Food and Drug Administration, Wikipedia
Confirm approval status against FDA labeling. This is the only FDA-approved indication. All other uses are off-label.
Evidence level: Preclinical
Sources: PubMed / NCBI, PubMed / NCBI
Supported by preclinical/animal studies only. No FDA-approved indication for cognitive enhancement or mitochondrial therapy. Human clinical trials for these uses are limited. Do not present as established therapy.
Evidence level: Regulatory observation
Sources: U.S. Food and Drug Administration, Wikipedia
Chemical-grade and research-grade methylene blue are not manufactured to pharmaceutical standards. Track quality concerns without directing users to specific sources.
Source records are stored in the repo and linked from each claim.
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