Dietary Antioxidant Capacity and Skin Photoaging: A 15-Year Longitudinal Study.

The long-term effect of diet on skin aging is largely unknown, but evidence suggests that the antioxidants from foods may mitigate the main component of skin aging caused by sun exposure. We assessed the association between the total antioxidant capacity of foods people eat and the photoaging of their skin. In a community-based, prospective study among 777 Australian adults aged <55 years at baseline, we estimated the total dietary antioxidant capacity of participants' diets in 1992, 1994, and 1996 and graded photoaging severity using microtopography in 1992, 1996, and 2007.

Validation of skin surface microtopography as a measure of skin photoaging in a subtropical population aged 40 and over.

Background: Evidence suggests that skin surface microtopography is a valid measure of photoaging among young adults, but whether this applies to older adults is unknown.

Methods: We investigated the association between degree of photoaging as measured by histological dermal elastosis and skin microtopography grades by decade of age from 40 to 89 years in a community sample in Australia. Skin surface replicas and punch biopsies were taken from 664 participants of the Nambour Skin Cancer Study.

Comparison of histological measures of skin photoaging.

Background: Dermal elastosis is considered the histological 'gold standard' for evaluation of skin photoaging, but the relation of the level of dermal elastosis to other histological indicators of photoaging is not clear.

Objective: To investigate how various proposed histological measures of photoaging compare with the level of dermal elastosis.

Methods: Prospective, community-based study in Southeast Queensland, Australia, among 89 participants aged 40-82 years.

UVA filters in sun-protection products: regulatory and biological aspects.

This review of published in vitro and in vivo studies concerning the biological effects of ultraviolet A (UVA; 320-400 nm) radiation illustrates the evidence for combining UVA and UVB filters in sun-protection products. These data have led to the development of new sunscreens as well as methods to evaluate their efficacy. After listing the UVA filters available and briefly noting the requirements for a high SPF, broad-spectrum sunscreen, the methods for evaluating the level of UVA protection will be described.

Factors associated with premature skin aging (photoaging) before the age of 55: a population-based study.

Background: Precise factors associated with premature skin aging, or photoaging, in the general population are unknown.

Objective: To examine the risk factors for photoaging in a Queensland community.

Methods: A cross-sectional study of 1,400 randomly selected residents aged 20-54 years, using casts of the back of the hand (surface microtopography) and dermatological assessment of photoaging.