Serum 25-hydroxyvitamin D level and erectile dysfunction: a causal relationship? Findings from a two-sample Mendelian...

Area of Science:

• Endocrinology
• Genetics
• Men's Health

Background:

• Observational studies suggest an association between serum 25-hydroxyvitamin D and erectile dysfunction (ED).
• The causal relationship between vitamin D levels and ED remains unclear.
• Investigating genetic links can elucidate causal pathways.

Purpose of the Study:

• To determine the causal effect of serum 25-hydroxyvitamin D levels on the risk of erectile dysfunction.
• Utilizing a two-sample Mendelian randomization approach for robust causal inference.

Main Methods:

• Employed Mendelian randomization (MR) using large-scale Genome-Wide Association Study (GWAS) data.
• Utilized 103 single nucleotide polymorphisms (SNPs) as instrumental variables for serum 25-hydroxyvitamin D.
• Applied inverse variance weighted (IVW) method as primary analysis, with sensitivity analyses for robustness.

Main Results:

• MR analysis indicated no statistically significant causal effect of serum 25-hydroxyvitamin D on ED risk (IVW OR = 0.9516, p = 0.5772).
• Sensitivity analyses confirmed the absence of heterogeneity and pleiotropy.
• Results were consistent across multiple MR methods.

Conclusions:

• This study does not support a causal association between genetically predicted serum 25-hydroxyvitamin D concentration and erectile dysfunction risk.
• Findings suggest that vitamin D levels may not be a direct causal factor for ED in individuals of European descent.