In mice with a genetic problem that causes gray hair, giving them an antioxidant called NAC in their water seems to help keep their fur from turning gray by protecting the cells that give hair its color.

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Evidence from Studies

Supporting (1)

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Community contributions welcome

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Mitochondrial deoxyguanosine kinase depletion induced ROS causes melanocyte stem cell exhaustion and hair greying

Cohort Study

Animal

2025 Jun 16

The study found that giving NAC to mice with a genetic problem that causes grey hair helped reduce damaging molecules, brought back pigment stem cells, and prevented grey hair, just like the claim says.

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No contradicting evidence found

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According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Mitochondrial deoxyguanosine kinase depletion induced ROS causes melanocyte stem cell exhaustion and hair greying

Score: 13

DOI: 10.1186/s13619-025-00242-0

Similar Assertions

Giving an antioxidant called NAC in drinking water helped slow down hair greying in mice that were genetically prone to it, possibly by reducing harmful molecules in their bodies.

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92%

When a certain gene is turned off in mice, it damages the stem cells that give hair its color—but not the regular color-making cells—so the hair gradually loses pigment and turns gray or white.

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72%