People from different ethnic backgrounds start going grey at different ages — if you're Caucasian, going grey before 20 is considered early; for Asians, before 25; and for Africans, before 30.

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Evidence from Studies

Supporting (1)

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The possibilities of correction of premature greying of hair and involutive hair changes

Narrative Review

The study doesn’t test anything new about when hair turns gray, but it says the same thing as the claim: that people of different backgrounds start going gray at different ages. So it backs up the claim.

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No contradicting evidence found

Gold Standard Evidence Needed

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

The possibilities of correction of premature greying of hair and involutive hair changes

Score: 1

DOI: 10.33667/2078-5631-2024-9-7-11

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Some people get gray hair early because of things like their genes, stress in their body, smoking, or not having enough of certain vitamins and minerals like iron or copper.

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If a kid in India gets gray hair before they’re 25, there’s a very high chance their family members also had gray hair young—so it’s probably something passed down in genes.

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Scientists think that when there’s too much damage from natural body chemicals (oxidative stress) and not enough protection from helpful antioxidants, it might cause hair to turn gray earlier than normal.

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People who go gray too early might have low levels of copper, iron, or vitamin B12—these nutrients might help keep hair its natural color.

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People who start going gray earlier than most tend to have less vitamin B12 in their blood and are more likely to be deficient in it than others their age.

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