Almond consumption increased UVB resistance in healthy Asian women.
J Cosmet Dermatol 2021;
20:2975-2980. [PMID:
33491323 PMCID:
PMC8451851 DOI:
10.1111/jocd.13946]
[Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 12/04/2020] [Accepted: 01/08/2021] [Indexed: 12/25/2022]
Abstract
BACKGROUND
Almonds are a rich source of phenolic and polyphenolic compounds, which have antioxidant activity. In vitro and in vivo studies have demonstrated that topical application of almond oil and almond skin extract reduces UVB-induced photoaging. Ultraviolet-B (UVB) protection by oral almond consumption has not been previously studied in humans.
OBJECTIVES
To investigate whether oral almond consumption can increase resistance to UVB radiation and reduce skin aging in healthy Asian women.
METHODS
Thirty-nine female participants (18-45 years) with Fitzpatrick skin type II-IV were randomly assigned to consume either 1.5 oz of almonds or 1.8 oz of pretzels daily for 12 weeks. Minimal erythema dose (MED) was determined using a standardized protocol, which determined the minimal radiation needed to induce erythema on the inner arm following UVB exposure. Facial skin texture was evaluated by two dermatologists using the Clinician's Erythema Assessment scale and Allergan Roughness scale. Facial melanin index, hydration, sebum, and erythema were determined using a cutometer.
RESULTS
The MED was increased in the subjects consuming almonds compared to the control group consuming pretzels. There were no differences noted between the groups consuming almonds versus pretzels in Allergan roughness, melanin, hydration, or sebum on facial skin.
CONCLUSIONS
Our findings suggest that daily oral almond consumption may lead to enhanced protection from UV photodamage by increasing the MED.
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