Avaliação dos níveis de retinol no colostro humano coletado no intervalo de 24 horas

Ribeiro, Karla Danielly da Silva; Araújo, Katherine Feitosa de; Pereira, Michelle C.; Dimenstein, Roberto

doi:10.1590/s0021-75572007000500015

Cited by 6 publications

(5 citation statements)

References 10 publications

(12 reference statements)

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“…The retinol concentration of colostrum milk was higher than that of breast milk, corroborating with previous research. 31,38,39 In colostrum milk, the basal levels of retinol in the population were comparable to those found in studies with women from the same region of Brazil (3.34 mmol/L), 40 Cuban women (3.56 mmol/L), 41 and lactating women in developed countries who had colostrum retinol above 3.49 mmol/L. 42,43 When we consider retinol expressed per grams of fat, the mean colostrum level also indicated satisfactory VA status in the population studied.…”

Section: Discussionsupporting

confidence: 77%

A Randomized Trial Evaluating the Effect of 2 Regimens of Maternal Vitamin A Supplementation on Breast Milk Retinol Levels

Bezerra¹,

Araújo

Azevedo

et al. 2010

J Hum Lact

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The aim of this study was to assess the effect of 2 different megadoses of retinyl palmitate on the level of retinol in the breast milk of healthy women. In total, 199 women were randomly allocated to 3 groups and supplemented in the postpartum period with a single retinyl palmitate dose of 200 000 IU (S1), a double dose of 200 000 IU 24 hours apart (S2), or no supplementation (C). Retinol content of colostrum and mature milk at 4 weeks was determined by high-performance liquid chromatography (HPLC). For colostrum, no significant difference was found between the groups (P = .965). The retinol content in mature milk differed between group C and groups S1 and S2 (P < .05). The double dose of vitamin A did not significantly increase the retinol content of milk at 4 weeks postpartum in comparison to a single dose; however, future research is needed to determine the optimal timing of the second dose of vitamin A.

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Section: Discussionsupporting

confidence: 77%

A Randomized Trial Evaluating the Effect of 2 Regimens of Maternal Vitamin A Supplementation on Breast Milk Retinol Levels

Bezerra¹,

Araújo

Azevedo

et al. 2010

J Hum Lact

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“…Procedures were adapted as described by Ribeiro et al. 17 for HM samples. Retinol concentrations ≤0.70 µmol/L in serum and ≤1.05 µmol/L in milk were considered insufficient.…”

Section: Methodsmentioning

confidence: 99%

Vitamin A intake of Brazilian mothers and retinol concentrations in maternal blood, human milk, and the umbilical cord

et al. 2018

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ObjectivesTo analyse intake of vitamin A (VA) and retinol concentrations in maternal blood, breast milk (BM), and the umbilical cord (UC) of newborns, and to determine the associations among these variables.MethodsWe performed a cross-sectional, epidemiological study of 180 mother–newborn dyads. Maternal and UC blood samples and BM were collected. VA intake by the mother over 30 days was assessed using a questionnaire.ResultsMean retinol concentrations in maternal serum, the UC, and BM were 0.65 ± 0.27, 0.36 ± 0.18, and 2.95 ± 2.70 µmol/L, respectively. Retinol concentrations <0.70 µmol/L were found in 57.2% of maternal blood samples and in 94.9% of UC samples. A total of 27.9% of BM samples showed retinol concentrations <1.05 µmol/L. Mean VA intake by the mothers was 1041.33 ± 1187.86 µg retinol activity equivalents/day and was inadequate (<550 µg retinol activity equivalents/day) in 44.7%.ConclusionsHigh proportions of insufficient retinol concentrations were observed in the UC, maternal blood, and BM. A high percentage of pregnant women had inadequate VA intake. Mothers with insufficient serum retinol concentrations had newborns with lower retinol concentrations in the UC. Higher retinol concentrations were observed in maternal blood and the UC with a higher VA intake.

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“…44,45 Segundo Meneses e Trugo, 46 47,49 Apesar disto, somente três estudos utilizaram o teor de vitamina A expresso por grama de lipídio. 13,18,22 Segundo a World Health Organization (WHO), 5 o leite materno maduro secretado a partir do 21o dia pós-parto é o mais adequado para estimar o estado nutricional relativo à vitamina A, uma vez que após esse período a concentração de vitamina A no leite se estabiliza. Na presente revisão, foram identificados quatro estudos que avaliaram a concentração de vitamina A nessa fase do leite.…”

Section: Tabelaunclassified

“…A, e produtos de origem animal, como o fígado, ricos em vitamina A pré-formada. [11][12][13][14][15][16][17][18][19] e cinco como trabalhos de conclusão de mestrado ou doutorado. [20][21][22][23][24] A Tabela…”

Section: Introductionunclassified

“…todologia.50 Pela utilização dessa metodologia em doze estudos brasileiros,[12][13][14][15][16][17][18][19][20][22][23][24] pode-se concluir que provavelmente houve boa quantificação das concentrações desse micronutriente. Os demais estudos 11,21 utilizaram espectrofotometria, que, segundo De Pee e Dary, 50 pode apresentar baixa especificidade, baixa acurácia e dificuldades de validação.…”

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Concentrações de vitamina A no leite humano e características socioeconômicas e nutricionais maternas: resultados de estudos brasileiros

Oliveira

Bergamaschi

2009

Rev. Bras. Saude Mater. Infant.

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O b j e c t i v e s : t o c o m p i l e t h e re s u l t s o f B r a z i l i a n s t u d i e s t h a t i n v e s t i g a t e d t h e v i t a m i n A c o n t e n t o f human milk. Sources: the searches were performed at LILACS, B a n c o d e Te s e s d a C a p e s , S c i E L O ( S c i e n t i f i c E l e c t ro n i c L i b r a r y ) , a n d P l a t a f o r m a L a t t e s d a t abases. The search strategy was: pregnant, lactating, h u m a n m i l k v i t a m i n A c o n c e n t r a t i o n , B r a z i l . T h e s e a rc These studies were heterogeneous in terms of sample s i z e , m i l k p h a s e , t i m e o f c o l l e c t i o n a n d m e t h o d f o r d e t e r m i n i n g v i t a m i n A c o n c e n t r a t i o n s . T h e s t u d y outcomes described average vitamin A concentrationsin human milk ranging from 0.62 to 4.50 µmol/L. C o n c l u s i o n s : t h e re w a s n o c o n s e n s u s a s t o t h e relationship between the vitamin A content of human m i l k a n d a d i e t w i t h a s u i t a b l e v i t a m i n A c o n t e n t , m a t e r n a l n u t r i t i o n a l s t a t u s , m a t e r n a l o b s t e t r i c a n d demographical characteristics and duration of pregnancy. The review indicates that future studies should u s e c a s u a l s a m p l e s o f m a t u re m i l k , a n d u s e h i g h performance liquid chromatography -HPLC -as the laboratory technique in order to quantify vitamin A. Key words Vitamin A, Milk, human, Vitamin A deficiency, Breast feeding Resumo O b j e t i v o s : a g re g a r e d i s c u t i r o s re s u l t a d o s d e estudos realizados no Brasil que avaliaram a concentração de vitamina A no leite materno. F o n t e s d o s d a d o s : f o r a m p e s q u i s a d a s a s b a s e s LILACS, Banco de Teses da Capes, SciELO (Scientific E l e c t ro n i c L i b r a r y ) , e P l a t a f o r m a L a t t e s -s e ç ã o d e p ro d u ç ã o c i e n t í f i c a . A s p a l a v r a s -c h a v e s u t i l i z a d a s foram: gestantes, lactante, concentração de vitamina Síntese dos dados: foram localizados 14 estudos, publicados entre 1988 e 2008, heterogêneos quanto ao tamanho da amostra, fase do leite, período do dia d a c o l e t a e m é t o d o d e d e t e r m i n a ç ã o d a s c o n c e nt r a ç õ e s d e v i t a m i n a A . F o r a m d e s c r i t a s c o n c e ntrações médias de vitamina Conclusões: não houve consenso sobre a relação entre concentração de vitamina A no leite humano e v i t a m i n a A d i e t é t i c a , e s t a d o n u t r i c i o n a l m a t e r n o Palavras-chave Vi t a m i n a A , L e i t e h u m a n o , Deficiência de vitamina A, Aleitamento materno

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Avaliação dos níveis de retinol no colostro humano coletado no intervalo de 24 horas

Cited by 6 publications

References 10 publications

A Randomized Trial Evaluating the Effect of 2 Regimens of Maternal Vitamin A Supplementation on Breast Milk Retinol Levels

A Randomized Trial Evaluating the Effect of 2 Regimens of Maternal Vitamin A Supplementation on Breast Milk Retinol Levels

Vitamin A intake of Brazilian mothers and retinol concentrations in maternal blood, human milk, and the umbilical cord

Concentrações de vitamina A no leite humano e características socioeconômicas e nutricionais maternas: resultados de estudos brasileiros

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