Detalhes do Documento

The Relevance of Plant-Based Diets and Micronutrient Supplementation for Body Composition: Data from the VeggieNutri Cross-Sectional Study

Autor(es): Pinheiro, C. ; Silva, F. ; Rocha, I. ; Martins, C. ; Giesteira, L. ; Dias, B. ; Lucas, A. ; Alexandre, A.M. ; Ferreira, C. ; Viegas, B. ; Bracchi, I. ; Guimaraes, J. ; Amaro, J. ; Amaral, Teresa ; Dias, C.C. ; Oliveira, A. ; Ndrio, A. ; Guimaraes, J.T. ; Leite, J.C. ; Negrão, R ; Keating, E

Data: 2024

Identificador Persistente: https://hdl.handle.net/10216/163793

Origem: Repositório Aberto da Universidade do Porto

Assunto(s): Ciências da Saúde, Ciências médicas e da saúde; Health sciences, Medical and Health sciences


Descrição

Objectives: This study aimed to compare the anthropometry and body composition of vegetarian and omnivorous adults living in Portugal, while exploring nutritional and health parameters underlying observed differences. Methods: 425 omnivorous (OMNI), lacto-ovo-vegetarian (LOV), or vegan (VEG) healthy adults were recruited. Anthropometry was measured, and bioelectrical impedance analysis was performed. Participants answered food frequency, sociodemographic, and lifestyle questionnaires. Serum iron, ferritin, and CRP were quantified by spectrophotometry, and serum B12 vitamin and homocysteine were quantified by chemiluminescent microparticle immunoassay. Results: Total protein intake significantly decreased with increasing strictness of vegetarian habits (median (P25; P75) in g/day: 98.6 (79.5; 123.1), 90.4 (65.9; 121.0), and 87.6 (59.8; 118.5) for OMNI, LOV and VEG, respectively; p = 0.020), and carbohydrate intake was the highest in LOV (median (P25; P75) in g/day: 231.5 (178.4; 287.9), 283.9 (227.3; 342.6), and 263.0 (222.0; 348.3) for OMNI, LOV and VEG, respectively; p = 0.001). VEG were the main users of B12 vitamin (93% in VEG vs. 17% in OMNI and 59% in LOV, p = 0.001), and LOV were the main users of iron supplements (29% in LOV vs. 14% in OMNI and 13% in VEG, p = 0.042), respectively. Blood levels of B12 vitamin correlated negatively with blood homocysteine (r(s) = -0.386, p < 0.001) and positively with % muscle mass (r(s) = 0.136, p = 0.005). Participants using iron supplements presented higher C-reactive protein (CRP) (p = 0.014) and they had lower % MM (p = 0.003). Finally, when compared to being OMNI, being LOV independently associated with: (a) having +4.8% (p = 0.002) of fat mass, which could be due to higher carbohydrate intake, and (b) having -2.2% (p = 0.043) of muscle mass. Our data suggest that the association between diet and muscle mass could be attenuated in VEG due to B12 supplementation and/or aggravated in LOV due to iron supplementation-associated inflammation.

Tipo de Documento Artigo científico
Idioma Inglês
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