Methylene Blue
Alternative-electron-acceptor dye that supports mitochondrial respiration. Cheap, effective, weirdly under-prescribed. Surprisingly broad use in cognition and cellular bioenergetics protocols.
What it actually is
Not a peptide. Methylene blue is a small-molecule synthetic dye, used as a textile dye since the 1870s and as an FDA-approved drug for methemoglobinemia. At low doses, it acts as a mitochondrial electron carrier, bypassing damaged sections of the electron transport chain to keep ATP production running.
Why peptide users come across it
Mechanism
At low doses, accepts electrons from NADH and donates to cytochrome c, restoring electron flow when complexes I and III are damaged. At higher concentrations, switches to a pro-oxidant role. Crosses the blood-brain barrier, central nervous system effects are part of the appeal.
Documented dose range
Side effects
- Blue-green urine and stool (visual indicator the dose was absorbed, not harmful)
- Tongue and teeth temporarily stained blue if sublingual
- Headache or mild nausea in first few days
- Serotonin syndrome risk if combined with SSRIs, SNRIs, MAOIs (do NOT stack)
- Hemolytic anemia in G6PD-deficient individuals
Contraindications
- G6PD deficiency (genetic test before running)
- Active SSRI / SNRI / MAOI use (serotonin syndrome risk)
- Pregnancy
- Methemoglobinemia treatment supersedes biohacking dose math, see a clinician if symptomatic
The Pepdex take
Use a glass dropper. Stains everything. Take in the morning, it's mildly stimulating and can disrupt sleep at evening doses. The stain on your tongue lasts hours, schedule accordingly.
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