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Vitamin D

Peer-reviewed research concerning vitamin d, summarized and appraised in plain language with every source cited.

11Studies

11Human studies

2026Most recent

4Countries

Impact of Vitamin D3 Supplementation on Androgens and Semen Parameters in Infertile Men: A Systematic Review and Meta-Analysis Based on Prospective Randomised Controlled Trials.

Archivos espanoles de urologia2025n = 945 subjects

Meta AnalysisHuman

This study looked at whether vitamin D3 supplementation improves hormone levels and semen quality in infertile men. It pooled data from six randomized controlled trials involving 945 men, measuring changes…

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Factorial analysis of zinc serum levels, fatty acids, oxidative stress parameters and supplementation on assisted reproductive technology outcome.

Journal of medical biochemistry2025n = 64 couples

Cross SectionalHuman

This study set out to identify which factors might influence pregnancy success in couples undergoing assisted reproductive technology (ART, fertility treatments that handle eggs and sperm outside the body). It…

Better Fertility Fertility & Sperm Inflammation

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Sex-specific associations of serum 25-hydroxyvitamin D concentrations with incident sarcopenia in older adults: A 2-year follow-up study.

The journal of nutrition, health & aging2025n = 1,292 (53% women)

CohortHuman

This study looked at whether vitamin D levels in the blood are linked to developing sarcopenia (age-related muscle loss) in older adults. It followed 1,292 Korean adults aged 70-84 without…

Aging Muscle & Strength Musculoskeletal

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