Banca de QUALIFICAÇÃO: ANA GABRIELLA COSTA LEMOS DA SILVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : ANA GABRIELLA COSTA LEMOS DA SILVA
DATA : 02/05/2018
HORA: 08:30
LOCAL: Sala de aula 7 do Departamento de Nutrição - DNUT/UFRN
TÍTULO:

Nutritional status in vitamin A and vitamin E of women following lactation.

PALAVRAS-CHAVES:

Breastfeeding; Retinol; Alpha-tocopherol; Lactation; Food consumption.

PÁGINAS: 91
GRANDE ÁREA: Ciências da Saúde
ÁREA: Nutrição
RESUMO:

In lactation, women need a greater nutritional intake both to replenish nutrients secreted in milk and to ensure adequate nutritional status, as in vitamins A and E, essential for growth, immunity and antioxidant status. Thus, this study aims to evaluate the nutritional status of vitamin A and vitamin E of women in the follow-up of lactation and its relationship with maternal milk levels and habitual dietary intake, as well as to verify the determinants of this nutritional status and composition of breast milk. The study was a longitudinal study of 43 lactating women recruited at a public hospital located in Natal-RN, Brazil. The collection of milk, blood and dietary information occurred in three moments: the first between 25 and 74 days postpartum; the second about 30 days after the first and the third 30 days after the second. Retinol and alpha-tocopherol from serum and maternal milk were analyzed by High Performance Liquid Chromatography. Values of retinol <0.7 μmol/L (20 µg/dL) in serum and <1.05 μmol/L (30 µg/dL) in milk, and serum alpha-tocopherol <12 μmol/L (517 µg/dL) were indicative of low levels. Dietary inadequacy was analyzed according to the Estimated Average Requirement (EAR) for lactating women, and intake was also classified by consumption quartiles. Serum retinol varied around 1.7 μmol/L following lactation, and low levels were found in 5% and in none of the cases in the first and third collection, respectively. Serum alpha-tocopherol decreased during lactation from 30.2 μmol/L in the first collection to 25.5 μmol/L in the third (p = 0.008), with a consequent increase in the percentage of low levels, going from none to 7% of the cases in the third collection. The concentrations of vitamins in breast milk presented similar values between the samples, and inadequate dietary intake of vitamin A and vitamin E was found in 58% and 100% of lactating women, respectively. When evaluating the relationships between the indicators, there was a positive correlation only between serum retinol and habitual vitamin A intake (r = 0.403, p = 0.007), and higher levels of serum retinol were found in infants classified in the highest quartile of consumption vitamin A (p = 0.031). The results showed a reduction only in serum alpha-tocopherol levels following lactation, an influence of dietary vitamin A intake on circulating levels of retinol, while vitamins in mature milk remained unchanged, even in low consumption and low nutritional status. These findings reinforce the importance of adequate feeding during the lactation period and suggest the existence of different mechanisms of nutrient transfer through the mammary gland, and it is important to monitor the micronutrient deficiency in this group.

MEMBROS DA BANCA:
Interno - 2149611 - CLELIA DE OLIVEIRA LYRA
Externo ao Programa - 1837366 - DANIELLE SOARES BEZERRA
Presidente - 2578592 - KARLA DANIELLY DA SILVA RIBEIRO RODRIGUES