Exploring the Causal Relationship between Vitamin D Levels and Deficiency with the Risk of Cataract: A Mendelian Randomisation Study.

What Was Tested

This observational study looks at Vitamin D, K2, Magnesium and Zinc.

To assess causality, the researchers then performed both one-sample and two-sample Mendelian randomisation (MR) analyses.

In the two-sample MR, publicly available summary statistics for vitamin D levels and deficiency were used to investigate their relationship with cataract.

Why It Was Studied

Whilst this correlation has been well reported, there is a lack of causal evidence.

Who Took Part

PubMed indexes the participants as middle-aged adults, both men and women.

How the Study Was Run

The researchers first conducted an observational study using UK Biobank (UKBB) data to explore the correlation between vitamin D levels and deficiency with incident cataract.

In the one-sample MR the researchers used genetic risk scores (GRSs) reflecting a genetic predisposition to higher vitamin D levels and vitamin D deficiency, examining its association with incident cataract.

Sensitivity analyses used a UKBB meta-analysis for vitamin D in a two-sample MR and a gene-focused analysis using variants in genes with a known role in vitamin D metabolism.

What Was Measured

PubMed files the paper under topics including Cataract, Mendelian Randomization Analysis, Vitamin D Deficiency, Vitamin D, Risk Factors, United Kingdom and Genetic Predisposition to Disease.

The authors tagged it with the keywords Genetics, Lens transparency and Mendelian randomisation.

What This Means in Plain Language

This is an observational study of Vitamin D, K2, Magnesium and Zinc.

Its findings take up roughly 6 sentences of the abstract and are left out here on purpose; the source paper is the place to read them.

The publication is from 2025 (Ophthalmic research), a journal based in Switzerland.

More context: the Vitamin D, K2, Magnesium and Zinc compound page, all human trials.