# What's Most Often Behind Gray Hair That Develops Over Time?

> Acquired canities, gray or white hair that develops with age, is the result of heredity. Texas barber exam disorders answer, quick reference.

Canonical: https://fadejunkie.com/practice/disorders/acquired-canities-genetics  
Last updated: 2026-08-11

**The answer is heredity. Acquired canities, gray hair that shows up as you age, is most often traced back to genetics.**

Chemical over-processing, a scalp fungus, and vitamin deficiencies can all cause real hair problems, but they're not the usual source of age-related graying. "Acquired" here just means it developed over time rather than being present from birth — it doesn't point to an outside cause. Heredity drives it, the same way it drives most patterns of hair loss.

## More Disorders questions

This is 1 of the real Disorders questions in fadejunkie's 299-question bank. See the [Disorders practice questions page](https://fadejunkie.com/practice/disorders) for a fuller sample, or try the [Disorders practice quiz](https://fadejunkie.com/education/quiz?topic=Disorders) and [flashcards](https://fadejunkie.com/education/flash?topic=Disorders) for free. A one-time $15 lifetime pass unlocks the complete question bank across all 13 tested topics.

More real Disorders questions: [Where Does Tinea Barbae Occur?](https://fadejunkie.com/practice/disorders/tinea-barbae-bearded-area).

## More exam topics

Browse every topic on the [Practice Question Hub](https://fadejunkie.com/practice), or see the [Texas Barber State Board Exam Guide](https://fadejunkie.com/guide/texas-barber-state-board-exam) for the full exam process — required hours, PSI scheduling, and fees.

## Related
- [Texas Barber Exam: Disorders Questions](https://fadejunkie.com/practice/disorders)
- [Barber Exam Practice Questions — All 13 Topics](https://fadejunkie.com/practice)