A recent study revealed that liquid methylene blue, which was used to dye fabrics, may become a promising solution for the problem of hair loss, especially among those taking popular weight loss drugs.
Although methylene blue has been known for years in health and bio-enhancement circles for its purported benefits as an anti-aging, mood booster, and brain enhancer, some of these claims lack strong scientific evidence.
But what's new is that researchers from the University of Maryland have found laboratory evidence indicating its ability to support scalp health and revitalize hair follicles.
During the study, researchers tested the effect of methylene blue on human hair follicle stem cells in the laboratory. It was found to promote the growth of these cells and protect them from death, as well as reduce oxidative stress caused by free radicals, which are molecules that damage cells with age or due to exposure to ultraviolet radiation and metabolic problems.
In addition, the team found that methylene blue activates a key biological pathway known as "β-catenin signaling," the same pathway responsible for repairing hair follicles, maintaining stem cell health, and accelerating wound healing.
When this compound was combined with minoxidil, a common hair growth treatment, activation of this pathway increased even further, resulting in a marked improvement in stem cell survival.
But the most interesting part of the study concerns users of GLP-1 drugs. These drugs are known to cause rapid weight loss, but they are also associated with hair loss as an unwanted side effect. One study indicates that users of semaglutide—which belongs to the class of GLP-1 receptor agonists—are 50% more likely to report hair loss compared to users of other weight-loss medications.
Experts attribute this in part to a lack of nutrients and protein during rapid weight loss, and to the fact that the weight loss process itself puts stress on the body.
To test whether the drugs themselves play a direct role in hair loss, researchers at the University of Maryland exposed hair follicle stem cells to varying concentrations of GLP-1 agonists. They found that higher doses killed a greater number of these cells. However, an encouraging result was that treating the cells with methylene blue before drug exposure provided significant protection, with a marked reduction in oxidative stress and cell death observed even at high drug doses.
Despite these promising results, researchers are careful to emphasize that all these findings are still in the laboratory stage, meaning they were conducted on cells in petri dishes and not on real humans. Therefore, they caution that further studies are needed before any practical conclusions can be drawn, such as determining appropriate dosages, confirming the safety of long-term use, and whether the same benefits will be observed in humans. Nevertheless, these preliminary results remain a source of hope, especially since hair loss is not merely a cosmetic issue; it can cause anxiety, depression, and social isolation, profoundly impacting a person's self-confidence and overall quality of life.
