The oldest synthetic drug still in use (FDA-approved since 1933) — now recognized as one of the most potent mitochondrial enhancers available. Methylene blue bypasses dysfunctional electron transport chain complexes to dramatically boost ATP production, sharpen cognition, and protect neurons. Oral capsules. Prescribed online from $151/month.
Get Methylene Blue Prescribed →Methylene blue (methylthioninium chloride) is the oldest synthetic drug still in clinical use — FDA-approved since 1933 for methemoglobinemia and used in hospitals as a dye and treatment for decades. But in the past 20 years, researchers have discovered that at low doses (0.5–4mg/kg), methylene blue acts as a mitochondrial electron carrier with profound implications for energy metabolism and cognitive function.
In the mitochondria, methylene blue acts as an alternative electron acceptor in the electron transport chain (ETC). It can accept electrons from Complex I and II and donate them directly to cytochrome c, effectively bypassing dysfunctional ETC complexes and maintaining ATP production even in aged or damaged mitochondria. This makes it uniquely powerful for anyone experiencing mitochondrial decline — which accelerates with age and manifests as brain fog, fatigue, and reduced cognitive performance.
Beyond mitochondrial enhancement, methylene blue inhibits monoamine oxidase A (MAO-A), has demonstrated anti-amyloid properties relevant to Alzheimer's research, reduces neuroinflammation, and provides significant antioxidant protection. At PeptidesRx, methylene blue is prescribed as oral capsules in 10mg, 15mg, and 25mg strengths for a convenient daily cognitive protocol. View full neuro catalog →
Acts as an alternative electron carrier, bypassing Complex I and II dysfunction to maintain ATP production. Dramatically increases cellular energy output — the fundamental fuel for all cognitive and physical performance.
Inhibits monoamine oxidase A, increasing available serotonin and dopamine. This contributes to improved mood, motivation, and the cognitive "lift" many users describe within days of starting.
Reduces neuroinflammation, inhibits tau aggregation, and has shown anti-amyloid properties in Alzheimer's research. Protects neurons from oxidative damage and mitochondrial dysfunction.
Functions as a redox cycling agent — alternating between oxidized and reduced forms to continuously scavenge free radicals. Unlike most antioxidants that are consumed once, methylene blue regenerates itself.
Note on Blue Urine: Methylene blue is an intense blue dye. At therapeutic doses (10mg+), it will turn your urine and sometimes stools a blue-green color. This is completely harmless and is actually a useful indicator that the medication is being absorbed. The color resolves within 24 hours of stopping use.
Methylene blue is taken orally as a capsule. Lower doses for cognitive enhancement; higher doses for intensive mitochondrial support.
| Protocol | Dose | Best For |
|---|---|---|
| Cognitive Starter | 10 mg/day | Focus, memory, mental energy |
| Standard Protocol | 15 mg/day | Mitochondrial + cognitive optimization |
| Intensive Protocol | 25 mg/day | Maximum mitochondrial support |
| Therapeutic Range | 0.5–4 mg/kg/day | Provider-determined per body weight |
* Take with food to minimize potential stomach upset. Avoid combining with SSRIs, SNRIs, or MAOIs without provider guidance (serotonin interaction potential at high doses). All protocols determined by your licensed provider.
30-day supply of compounded methylene blue capsules, prescribed by a licensed U.S. provider. All strengths include consultation and prescription.