Seasonal Variations of Vitamin D in VegetariansGabriella Lavalle*
Clinical Pathology Laboratory, Bracciano Hospital, Bracciano, Rome, Italy
- *Corresponding Author:
- Gabriella Lavalle
Clinical Pathology Laboratory
Bracciano Hospital, Bracciano
E-mail: [email protected]
Received Date: February 23, 2017 Accepted Date: March 13, 2017 Published Date: March 20, 2017
Citation: Lavalle G (2017) Seasonal Variations of Vitamin D in Vegetarians. Vitam Miner 6: 152. doi:10.4172/2376-1318.1000152
Copyright: © 2017 Lavalle G. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Aim: Adequate levels of vitamin D are vital for bone homeostasis throughout the life cycle, especially at older ages. We aimed to assess 25-hydroxivitamin status and seasonality variations in a sample of vegetarians stratified for age and gender.
Methods: The study included 347 vegetarians, whose serums were collected between March and May (before summertime-PreS) and then between August and September (after summertime-PostS). Serum 25-hydroxyvitamin (Vitamin D) was measured by an automated immunoassay (ARCHITECT, Abbott).
Results: PreS samples showed a Vitamin D median of 18.3 ng/mL and 57% resulted as deficient (<20 ng/mL) while only 13% resulted as sufficient (>30 ng/mL). The deficient fraction was the mode class at all ages. No statistically significant differences among age and sex classes were detected. PostS samples showed a Vitamin D median of 36.0 ng/mL with a significant increase of 32% as compared to PreS; 26% resulted as deficient while only 36% resulted as sufficient. In subjects aged >69 years this increase was statistically smaller than in other age groups. Mode was the sufficient class up to 49, the insufficient class (20-30 ng/mL) between 50 and 69 and the deficient class over 69 years.
Conclusions: These results confirm that exposure to the sun increases the levels of vitamin D in young and middle-aged vegetarians but not in the elderly and highlight the need for dietary strategies to increase vitamin D intake especially in the older age classes.