Certain compounds possess exceptional potential in the field of scientific research. An example of such a compound is methylene blue, also known as methylthioninium chloride. Methylene blue was initially developed as a blue dye and a pharmaceutical, but it has since garnered considerable attention for its diverse properties and potential applications.[R]

One of the primary medical uses of methylene blue is in the treatment of methemoglobinemia, a condition where the blood’s ability to carry oxygen is compromised. This condition can be life-threatening if left untreated. Methylene blue has proven to be a reliable and effective solution for this critical medical issue.[R][R]

Interestingly, the historical significance of methylene blue also extends to its early effectiveness in treating malaria in 1891. With the introduction of chloroquine, this specific application was abandoned. [R]

In the realm of neuroprotection, methylene blue has shown promise in addressing conditions such as Alzheimer’s disease. Its unique properties, including its ability to reduce the generation of reactive oxygen species (ROS), have made it a subject of great interest among researchers exploring treatments for neurodegenerative disorders.[R][R][R]

It’s important to note that methylene blue while showcasing its potential in various scientific fields, is strictly intended for research purposes only. In the sections that follow, we will look deeply into the fascinating research supporting methylene blue, investigating its potential in combating neurodegenerative diseases and its emerging role as a valuable tool in the fight against cancer. 

Key Features

RCD.Bio offers Methylene Blue Powder with the following specifications:

  • A purity of 98%, verified by third-party laboratory testing.
  • Available in powder form: 2g and 5g

Methylene Blue

  • CAS Number: 61-73-4
  • Molar Mass: 319.85 g·mol−1
  • Chemical Formula: C16H18ClN3S
  • IUPAC Name: 3,7-bis(Dimethylamino)-phenothiazin-5-ium chloride
  • Synonyms: CI 52015, basic blue 9

How Methylene Blue Work?

Methylene Blue is a compound that possesses several confirmed mechanisms of action. Understanding how it works is crucial to comprehending its effects and potential benefits. 

One of the ways in which Methylene Blue works is by converting the form of iron found in hemoglobin, a component of red blood cells. Normally, iron exists in a reduced ferrous form (Fe2+). However, in certain conditions like methemoglobinemia, iron can be found in an oxidized ferric form (Fe3+), which can impair the oxygen-carrying capacity of red blood cells. Methylene Blue helps convert ferric ion back to the ferrous form, allowing for proper oxygen transport in the body. [R][R]

Additionally, Methylene Blue plays a role in enhancing the synthesis of heme, a crucial protein with multiple biological functions. Heme is responsible for carrying oxygen and participating in electron transfer processes. [R][R]

Moreover, Methylene Blue acts as an electron donor for the mitochondria’s complex I–IV, which is involved in the production of adenosine triphosphate (ATP). ATP is an energy-carrying molecule that is essential for cells to operate and survive. By donating electrons, Methylene Blue can increase ATP production, providing the necessary energy for cellular activities.[R]

Furthermore, Methylene Blue has been found to enhance the mitochondria’s ability to generate NAD+ (nicotinamide adenine dinucleotide). NAD+ is a molecule present in every cell and plays a crucial role in energy generation. By promoting NAD+ synthesis, Methylene Blue supports the efficient production of energy within cells. [R][R]

Lastly, it also performs antioxidant functions in mitochondria. Low doses of methylene blue exhibit this effect. It has been demonstrated that it causes oxidative stress, which is bad for your body and general health, at high levels. [R]

The scientific basis behind the benefits of Methylene Blue

Numerous research investigations and trials on animals suggest that methylene blue may have a number of benefits. 

Septic Shock

Septic shock is a severe and life-threatening condition that occurs as a result of an infection, leading to a dangerous drop in blood pressure.[R] Understanding the treatment options for septic shock is essential for managing this critical condition effectively.

In a clinical analysis of 16 articles, it has been suggested that methylene blue (MB) can be used as an adjuvant therapy for septic shock. When septic shock patients continue to experience low blood pressure despite the use of vasopressors, the authors recommended the administration of methylene blue as an additional treatment. This indicates that methylene blue may have a beneficial role in stabilizing blood pressure and improving outcomes in septic shock patients.[R]

Furthermore, in a clinical experiment involving patients who were in septic shock, even more encouraging outcomes were attained. It was discovered that administering MB caused a brief and repeatable rise in blood pressure. A boost in heart function was linked to this impact. [R] This may suggest that methylene blue may have a positive impact on cardiovascular performance in septic shock patients.


Malaria is a disease caused by the parasite Plasmodium falciparum. [R]Understanding the treatment options for malaria is essential for preventing this prevalent and frequently fatal disease.

According to an analysis of 21 research studies involving 1,504 test subjects, methylene blue (MB) has consistently shown success in possibly treating and reducing malaria symptoms. The use of methylene blue therapy may have positive effects on the management of the disease; however, it is important to note that there have been reports of minor gastrointestinal problems and discoloration of the urine, which frequently turns blue, in association with the use of methylene blue to treat malaria.[R]


Methemoglobinemia is a condition characterized by elevated levels of methemoglobin (MG) in the body, which hinders the efficient transport of oxygen. This condition can lead to symptoms such as blue skin, breathing difficulties, coma, and even death. [R]

Studies have shown that methylene blue may play a significant role in the treatment of methemoglobinemia. Methylene blue may potentially convert methemoglobin back to hemoglobin (HB), which restores the blood’s capacity to carry oxygen. [R]

Due to its effectiveness in lowering methemoglobin levels in the blood, the Food and Drug Administration (FDA) has approved the use of methylene blue USP grade (United States Pharmacopeia) for the treatment of acquired methemoglobinemia. By reducing the levels of methemoglobin, methylene blue may help restore the oxygen-carrying capacity of the blood, alleviating symptoms and promoting recovery in individuals with this condition.[R]

Cognitive Performance

In a clinical study involving 26 test subjects, the administration of low dosages of methylene blue (ranging from 0.5 to 4.0 mg/kg body weight) resulted in a 7% increase in memory retrieval compared to a placebo. This suggests that methylene blue may have a positive impact on memory recall abilities. Additionally, when engaging in specific activities, individuals who received methylene blue exhibited higher MR imaging activity compared to control subjects, indicating increased brain activity associated with cognitive processes. [R]

Pre-clinical research has also demonstrated the potential cognitive benefits of methylene blue. It was found that methylene blue enhanced memory retention in avoidance and appetitive tasks, suggesting an improvement in learning and memory. Moreover, in a separate study, methylene blue was able to restore spatial memory that had been impaired by a cytochrome oxidase inhibitor. This suggests a potential protective effect of methylene blue on memory function.[R]


Claustrophobia is a common anxiety disorder characterized by a fear of confined spaces. In a trial examining the effects of methylene blue (MB) on claustrophobic adult test subjects, the researchers conducted 5-minute extinction tests in an enclosed chamber. The results indicated that methylene blue had an impact on contextual memory, improving it in the participants. However, it did not show any significant effect on initial or post-training claustrophobic anxiety levels. This suggests that while methylene blue may enhance contextual memory, it may not directly address the underlying anxiety associated with claustrophobia.[R]

Another study involving adult test subjects investigated the effects of methylene blue (260 mg) compared to a placebo. The participants were divided into two groups and given either methylene blue or a placebo after a productive or fruitless session. The findings revealed that when methylene blue was administered after a productive session, it improved memory and recall of fear extinction. However, when methylene blue was given following a fruitless session, it had a detrimental effect. [R]

Alzheimer’s Condition

In a phase II clinical trial, it was observed that six months of methylene blue (MB) therapy resulted in improved cognitive performance in test subjects with Alzheimer’s disease. This suggests that MB may have a positive effect on cognitive function in individuals with AD. While further research is needed to fully understand the mechanisms and long-term effects, this trial provides promising evidence of the potential benefits of MB in AD management. [R]

Pre-clinical investigations involving animals with AD have also explored the effects of chronic dietary MB therapy. These studies have shown that MB therapy can reduce amyloid-beta levels, which are associated with the formation of plaques in the brains of individuals with AD. Additionally, deficits in memory and learning were found to be improved with the administration of MB therapy. These findings suggest that MB may have a neuroprotective effect and contribute to the improvement of cognitive function in AD. [R]


Depression is a mental health condition characterized by persistent feelings of sadness, hopelessness, and a loss of interest in activities. Exploring potential treatment options for depression is crucial in helping individuals find relief and improve their overall well-being.

In a placebo-controlled experiment involving 35 physically healthy female test subjects with severe depression, methylene blue (MB) showed promise as a potential antidepressant. The test subjects received a daily dose of 15 mg of methylene blue over a 3-week period. The results indicated that methylene blue appeared to be a possible antidepressant, with few negative consequences observed during the trial. This suggests that methylene blue may have a beneficial effect in alleviating symptoms of depression.

However, it is important to note that further research is needed to establish the safety, and efficacy of methylene blue for the treatment of depression. [R]

Bipolar Disorder

Bipolar disorder is a mental health condition characterized by alternating episodes of depression and mania. It is important to explore potential treatment options that can help individuals with bipolar disorder manage their symptoms and improve their quality of life.

In a randomized crossover study, methylene blue (MB) was investigated for its effects on bipolar disorder patients. The study involved administering a dose of 195 mg of methylene blue to the participants. The results indicated that methylene blue reduced depressive symptoms in individuals with bipolar disorder. Additionally, it was observed that methylene blue, similar to a placebo, also lessened the signs and symptoms of anxiety in these patients. [R]

Antidote for Cyanide Poisoning

Methylene blue has been recognized as a possible antidote for potassium cyanide poisoning due to its unique properties and interactions with the body’s electron transport chain. When administered in large doses, methylene blue may act as an alternative electron acceptor, similar to oxygen, and can be reduced by elements within the electron transport chain. This mechanism allows methylene blue to counteract the effects of cyanide poisoning. This remedy was first successfully tested in 1933 by Dr. Matilda Moldenhauer Brooks in San Francisco, although it was first demonstrated by Bo Sahlin of Lund University in 1926. [R][R]


Antidepressants (such as selective serotonin reuptake inhibitors or MAO inhibitors), drugs that influence serotonin levels, and some opioids may interact with methylene blue. Serotonin syndrome is a disorder that may be seriously debilitating as a result of these interactions. [R]

This article is intended for educational purposes only.

Potential side effects

Dizziness, headaches, confusion, nausea, vomiting, abdominal discomfort, and coloring of the skin or urine are only a few of the possible side effects of methylene blue. [R]

Where Can I Buy  Methylene Blue Online?

When buying Methylene Blue at on affordable price, it is important to choose a reputable seller who provides quality products. At, each product batch we sell is accompanied by a third-party-issued Certificate of Analysis showing the test results of identification, purity, and concentration of our product. Some also offer pharmaceutical-grade methylene blue powder.


Methylene blue is a chemical that has a lot of different properties and uses. It has been shown to be useful in a number of medical areas. It is approved to treat methemoglobinemia, a disease that makes it hard for the blood to carry oxygen. Methylene blue has also shown promise as a way to treat septic shock, malaria, Alzheimer’s disease, sadness, bipolar disorder, and cyanide poisoning. However, it’s important to stress that methylene blue should only be used for research purposes. There may be side effects and drug interactions with the compound, and more study is needed to find out if it is safe and effective for human consumption,


Please take note of the scientific applications of this product and carefully read our Terms and Conditions before making a purchase from By completing your order and submitting payment, you agree to abide by our Terms and Conditions. Please be aware that the product packaging may differ slightly from the images displayed on our website.

If for any reason you are not completely satisfied with the product you receive, please contact us at [email protected]. Our team is dedicated to ensuring customer satisfaction and will be happy to assist you.

PLEASE NOTE: All products offered by are strictly intended for laboratory and research purposes only. They are not intended for use on animals or humans.