Is diet related to skin condition? A Mendelian randomization study

Area of Science:

• Nutritional Science
• Dermatology
• Genetics

Background:

• Observational studies suggest diet influences skin conditions.
• Causal links between diet and skin health remain largely unestablished.
• UK Biobank and large-scale genome-wide association studies (GWAS) provide valuable data.

Purpose of the Study:

• To investigate potential causal relationships between dietary factors and skin conditions.
• To analyze the impact of 17 dietary factors on four distinct skin conditions.
• To leverage genetic data for robust association analysis.

Main Methods:

• Utilized UK Biobank data for dietary intake and skin condition information.
• Employed genetic prediction methods (e.g., Mendelian randomization) to infer causality.
• Analyzed associations between genetically predicted dietary intake and skin conditions like aging, pigmentation, and skin cancer.

Main Results:

• Oily fish, tea, and salad/raw vegetable intake showed associations with reduced risk of skin aging, pigmentation, and keratinocyte skin cancer.
• Coffee, pork, beef, champagne/white wine, and bread intake were linked to increased risks of skin aging, cutaneous melanoma, and keratinocyte skin cancer.
• Specific odds ratios (OR) and p-values were reported for each significant association.

Conclusions:

• Genetically predicted intake of oily fish, tea, and salad/raw vegetables may have protective effects on skin health.
• Consumption of coffee, pork, beef, certain alcoholic beverages, and bread may increase the risk of specific skin conditions.
• The findings suggest potential causal dietary links to skin aging, pigmentation, and cancer, warranting further investigation.