Can You Stack Methylene Blue With Other Nootropics?

Most common nootropics have no documented interaction with methylene blue. The ones to watch are anything that raises serotonin or blocks monoamine oxidase (MAO), because Ramsay and colleagues (British Journal of Pharmacology, 2007) found methylene blue is a potent MAO-A inhibitor. That one question, not a general "more supplements, more risk" rule, is how we sort what to stack.

• Caffeine, L-theanine, and creatine have no documented interaction with methylene blue and are commonly stacked with it.
• 5-HTP, SAMe, and St. John's Wort raise serotonin, which puts them under the same serotonin syndrome concern the FDA label for methylene blue injection raises for SSRIs.
• Rhodiola Rosea deserves real caution, because a 2009 lab study by van Diermen and colleagues found its root extracts inhibit monoamine oxidase, the same enzyme methylene blue inhibits.
• Ashwagandha, Bacopa Monnieri, and Ginkgo Biloba are a gray zone. The evidence is early and indirect, so check with your provider first instead of guessing.

Important: The FDA label for methylene blue injection (Provayblue) warns about serotonin syndrome with serotonergic medications, including SSRIs and MAOIs. Review the full adverse medications list before use.

The mechanism that matters is MAO-A. Ramsay and colleagues (British Journal of Pharmacology, 2007) measured methylene blue as a potent, reversible inhibitor of monoamine oxidase A, the enzyme that breaks down serotonin, and they point to that as the reason methylene blue has caused serotonin toxicity in people taking SSRIs. On its own, that is one thing. Add something else that pushes serotonin up, and you have more serotonin coming in and less being cleared.

So this is the filter we use for any nootropic: does it raise serotonin, or does it also block MAO? If both answers are no, there is no known reason for concern. If either is yes, be careful, whether it is sold as a supplement or a prescription.

To be plain about the limit: "no documented interaction" means nobody has found a mechanism for one. It does not mean anyone ran a safety study on that exact pair. For anything not listed, use the same MAO and serotonin filter.

Some nootropics do not sort cleanly into "fine" or "avoid." A few popular ones have research that touches serotonin or MAO, but it is early, done in animals, or too indirect to say much. We would rather tell you that than force an answer.

For any of these three, check with your healthcare provider before combining it with methylene blue. No clear warning is not the same as no risk.

Rhodiola Rosea is a popular adaptogen in nootropic stacks, marketed for stress resilience and energy. Rhodiola is the one on this page we would not stack with methylene blue. It rarely shows up on serotonin warning lists, but van Diermen and colleagues (Journal of Ethnopharmacology, 2009) found that Rhodiola rosea root extracts inhibited both MAO-A and MAO-B in a lab assay. That was a test-tube study, not a study in people, and it is still the same enzyme methylene blue inhibits.

Do not switch the same day. The FDA label for methylene blue injection (Provayblue) tells patients not to take serotonergic drugs within 72 hours after the last dose of methylene blue. That is the one published waiting period that names methylene blue directly.

Going the other way, prescription labels set longer gaps for MAOI antidepressants. The FDA label for sertraline (Zoloft), for example, says at least 14 days must pass between stopping an MAOI antidepressant and starting sertraline. Nobody has run a washout study on methylene blue as a supplement, so there is no exact number to give you for that.

If you are moving between an MAO-inhibiting supplement and methylene blue, in either direction, ask your healthcare provider how long to wait.

Do not combine methylene blue with:

• 5-HTP or tryptophan supplements
• SAMe
• St. John's Wort
• Rhodiola Rosea (inhibited MAO in a 2009 lab study)

That is on top of prescription SSRIs, SNRIs, MAOIs, and other serotonergic medications, which the FDA label for methylene blue injection warns about. Review the full adverse medications list and consult your healthcare provider before starting methylene blue in any form.

Every Nutricel product uses USP-grade methylene blue, is made in an NSF GMP verified facility in the United States, and our capsules are third-party tested by independent labs. The difference between them is what goes in alongside the methylene blue.

Blue Boost is our core formula: 12mg of methylene blue per capsule with Vitamin C Ester and organic cacao. If you mainly want methylene blue itself, start here.

Blue Immune combines methylene blue with copper, magnesium, NAC, grass-fed beef liver, and camu camu for fatigue and cellular energy support, based on the Root Cause Protocol.

Blue Shroom pairs methylene blue with six organic mushroom extracts including lion's mane, reishi, cordyceps, chaga, shiitake, and turkey tail.

Blue Renew is built around GlyNAC with collagen and creatine, aimed at longevity and brain function as you age.

Blue Remove combines zeolite, curcumin, and nattokinase, aimed at circulation and the body's normal inflammatory response.

Blue Liquid is USP-grade methylene blue in a dropper bottle (1%, 10mg per mL), for people who prefer liquid and want to adjust in small steps.

Sam Carlson, Marketing Developer at Nutricel

Sam is a marketing developer at Nutricel who writes the Nutricel Insights series to help our customers understand methylene blue and make informed choices, translating the published research into plain language. Sam is not a medical professional, and these articles are intended as education rather than medical advice. You should always speak with your healthcare provider before starting any supplement.