A Randomized, Controlled Trial of Vitamin D Supplementation on Cardiovascular Risk Factors, Hormones, and Liver Markers in Women with Polycystic Ovary Syndrome.
Nutrients
; 11(1)2019 Jan 17.
Article
in En
| MEDLINE
| ID: mdl-30658483
ABSTRACT
Polycystic ovary syndrome (PCOS) increases the risk of metabolic syndrome and non-alcoholic-fatty-liver disease (NAFLD). Vitamin D supplementation may exert positive effects on liver biochemistry in patients with NAFLD; however, its effects on PCOS are unknown. This randomized, double-blind, placebo-controlled study explored the effect of vitamin D supplementation on cardiovascular risk factors (high-sensitivity C-reactive protein (hs-CRP), weight, body mass index (BMI), lipid profile, glucose levels, insulin levels, the homeostatic model assessment-insulin resistance (HOMA-IR), hormones (free androgen index (FAI), testosterone, sex hormone binding globulin (SHBG), and liver markers (alanine aminotransferase (ALT), hyaluronic acid (HA), N-terminal pro-peptide of type III procollagen (PIIINP), tissue inhibitor of metallo-proteinases-1 (TIMP-1), and the enhanced liver fibrosis (ELF) score). Forty women with PCOS were recruited and randomized to vitamin D (3200 IU) or placebo daily for 3 months. All outcomes were measured at baseline and 3 months follow-up (FU). Greater increases in vitamin D levels were shown in the supplementation group (vitamin D, baseline 25.6 ± 11.4 nmol/L, FU 90.4 ± 19.5 nmol/L vs. placebo, baseline 30.9 ± 11.1 nmol/L, FU 47.6 ± 20.5 nmol/L, p < 0.001). Between groups comparisons (% baseline change) revealed significant differences in ALT (p = 0.042) and a weak effect indicating a greater reduction in the HOMA-IR in the vitamin D group (p = 0.051). No further between group differences were seen in other cardiovascular risk factor, liver markers, or hormones. This study supports beneficial effects of vitamin D supplementation on liver markers and modest improvements in insulin sensitivity in vitamin D deficient women with PCOS.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Polycystic Ovary Syndrome
/
Vitamin D
/
Biomarkers
/
Cardiovascular Diseases
/
Dietary Supplements
Type of study:
Clinical_trials
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Etiology_studies
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Prognostic_studies
/
Risk_factors_studies
Limits:
Adolescent
/
Adult
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Female
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Humans
/
Middle aged
Language:
En
Journal:
Nutrients
Year:
2019
Document type:
Article
Affiliation country:
Reino Unido