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19 July 2026

Scientific explanation of ageing body scent

This topic provides a scientific explanation of a biological phenomenon that can serve as a minor illustrative example for questions regarding the application of science and technology in daily life, but it lacks the depth or policy significance to be a direct exam question.

1 min read 1 questions 2 prelims

Notes

  • Ageing body scent is primarily caused by the chemical compound 2-nonenal.
  • The process begins around age 40 as natural antioxidant defenses weaken.
  • Weakened defenses lead to the oxidation of omega-7 unsaturated fatty acids, such as palmitoleic acid, on the skin.
  • 2-nonenal is an unsaturated aldehyde that is water-repellent, making it resistant to removal by standard soap and water.
  • Persimmon extract, which contains tannins, is chemically effective at neutralizing 2-nonenal.
  • Mitigation strategies include a diet rich in antioxidants to reduce oxidative stress and maintaining hydration.

Questions

  1. Explain the biochemical mechanism behind the phenomenon of age-related body odour and discuss the role of antioxidants in mitigating oxidative stress on human skin. 150 words
    Attempt this — 150 words in 8 min
    0 / 150 words 8:00

Prelims

  1. Which chemical compound is primarily responsible for the distinct body odour associated with the ageing process?

  2. Why is 2-nonenal difficult to remove through standard hygiene practices?

Syllabus

Topics

Sources

250words.in · https://250words.in/daily/2026-07-19/scientific-explanation-of-ageing-body-scent