Xuanchen Liu, Xin Li, Jiguang Ma

Beverage consumption and facial skin aging: Evidence from Mendelian randomization analysis

  • Dermatology

AbstractBackgroundObservational studies have linked coffee, alcohol, tea, and sugar‐sweetened beverage (SSB) consumption to facial skin aging. However, confounding factors may influence these studies. The present two‐sample Mendelian randomization (MR) investigated the potential causal association between beverage consumption and facial skin aging.MethodsThe single‐nucleotide polymorphisms (SNPs) associated with coffee, alcohol, and tea intake were derived from the IEU project. The SSB‐associated SNPs were selected from a genome‐wide association study (GWAS). Data on facial skin aging were derived from the largest GWAS involving 16 677 European individuals. The inverse variance‐weighted (IVW) was the main MR analysis method, supplemented by other methods (MR‐Egger, weighted median, simple mode, and weighted mode). The MR‐Egger intercept analysis was used for sensitivity analysis. Moreover, we conducted a replication analysis using data from another GWAS dataset on coffee consumption to validate our findings.ResultsFour instrumental variables (IVs) sets were used to examine the causal association between beverage consumption (coffee, alcohol, tea, SSB) and facial skin aging. Our results revealed that genetically predicted higher coffee consumption reduced the risk of facial skin aging (OR: 0.852; 95% CI: 0.753–0.964; p = 0.011, IVW method). The sensitivity analysis confirmed the robustness of the findings, with no evidence of pleiotropy or heterogeneity. The results of replicated MR analysis on coffee consumption were consistent with the initial analysis (OR = 0.997; 95% CI = 0.996–0.999; p = 0.003, IVW method).ConclusionsThis study manifests that higher coffee consumption is significantly associated with a reduced risk of facial skin aging. These findings can offer novel strategies for identifying the underlying etiology of facial skin aging.

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