Dietary Antioxidant Capacity and Skin Photoaging: A 15-Year Longitudinal Study
Maria Celia B Hughes1, Gail M Williams2, Hervé Pageon3
1Population Health Department, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia.
The Journal of Investigative Dermatology
|July 20, 2020
Summary
High dietary antioxidant capacity may slow skin aging in adults over 45. This study found that consuming antioxidant-rich foods reduced photoaging by about 10% over 15 years in older adults.
Area of Science:
- Nutrition Science
- Dermatology
- Gerontology
Background:
- The long-term impact of diet on skin aging remains unclear.
- Dietary antioxidants may counteract skin aging caused by sun exposure.
Purpose of the Study:
- To investigate the association between dietary antioxidant capacity and skin photoaging.
- To determine if dietary antioxidants influence the aging process of the skin.
Main Methods:
- Prospective community-based study of 777 Australian adults (<55 years at baseline).
- Dietary antioxidant capacity assessed in 1992, 1994, 1996.
- Skin photoaging graded using microtopography in 1992, 1996, 2007.
- Analysis used ordinal logistic regression and generalized estimating equations.
Main Results:
- Severe skin photoaging prevalence increased from 42% to 88% over 15 years.
- Adults over 45 with high antioxidant diets showed ~10% less photoaging.
- No significant association found in adults aged 45 or younger.
Conclusions:
- Antioxidant-rich foods may help retard skin aging in individuals over 45.
- Dietary choices play a role in mitigating age-related skin changes, particularly in older adults.
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