One study, published in the journal Nature in 2023, found that graying hair may be caused by stem cells in the hair follicle getting stuck in a certain developmental stage. The researchers were able to reverse this process in mice, which resulted in the hair regaining its original color.
Another study, published in the journal FASEB in 2017, found that a compound called phenylthiourea (PTU) can reverse graying hair in mice. PTU works by inhibiting an enzyme that is involved in the production of hydrogen peroxide, which is a molecule that can damage hair follicles.
While these studies are encouraging, it is important to note that they have not yet been replicated in humans. More research is needed to determine whether or not these treatments are safe and effective for people.
In the meantime, there are a number of things that people can do to help prevent gray hair and maintain healthy hair color:
- Eat a healthy diet that is rich in fruits, vegetables, and whole grains.
- Get enough sleep.
- Manage stress.
- Avoid smoking and excessive alcohol consumption.
- Protect hair from the sun and other environmental damage.
If you are concerned about gray hair, you should talk to your doctor. They can help you to determine whether or not there is an underlying medical condition that is causing your hair to gray prematurely. They can also discuss the various treatments that are available, including hair dye and other cosmetic options.