Why Do Hairs Turn Grey as We Age?
Age‐induced hair greying – the multiple effects of oxidative stress
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
As we get older, the cells that give hair its color get damaged by rust-like stuff in the body called oxidative stress. These cells need protectors like BCL-2 and catalase to survive, but those weaken over time.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
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Max 90Cohort Studies
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Evidence Score
Based on clinical experience or non-systematic literature reviews. The lowest level of evidence as they are most susceptible to bias and personal perspective.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
As we get older, the cells that give hair its color get damaged by rust-like stuff in the body called oxidative stress. These cells need protectors like BCL-2 and catalase to survive, but those weaken over time.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
Max 44Case Reports & Case Series
Max 30Expert Opinion & Narrative Reviews
Max 51 / 5
Evidence Score
Based on clinical experience or non-systematic literature reviews. The lowest level of evidence as they are most susceptible to bias and personal perspective.
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Claims (3)
As we age, damage from oxidative stress can harm the cells that give hair its color, especially because the body’s natural antioxidants weaken over time — this leads to grey hair.
As we get older, the cells that give hair its color start to die off because of stress and lower levels of a protective protein, which is why hair turns gray and doesn’t grow back colored.
The pigment cells in your hair follicles can get damaged by normal sun exposure and the way they make color, especially as you get older, because their natural defenses weaken over time.