Influência de variáveis socioeconômicas e de saúde materno-infantil sobre os níveis de retinol no colostro humano

Dimenstein, Roberto; Simplício, Janicéia L.; Ribeiro, Karla Danielly da Silva; Melo, Illana Louise Pereira de

doi:10.1590/s0021-75572003000600009

Cited by 17 publications

(14 citation statements)

References 11 publications

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“…Resultados semelhantes foram observados por Dimenstein et al 28 e Vítolo et al 7 ao investigarem a associação da concentração de vitamina A no leite materno em nutrizes brasileiras com variáveis socioeconômicas.…”

Section: Discussionunclassified

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Vitamin A concentration in mature human milk

Souza¹,

Saunders²,

Dolinsky³

et al. 2012

J Pediatr (Rio J)

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Objective: To quantify vitamin A levels in mature milk of 196 nursing women who were treated at the Maternity School of Rio de Janeiro and to evaluate its correlation with sociodemographic variables and degree of nutrition knowledge. Methods:To quantify retinol concentrations, 10 mL of mature milk were collected by manual expression of one breast, 2 hours after the last feed, in the morning period. Values below 1.05 µmol/L and 2.3 µmol/L were considered inadequate to meet satisfactory intake and to constitute vitamin A liver reserve, respectively. The following variables were also assessed: sex, age, familiar income, maternal education, basic sanitation conditions, number of people in the household, maternal age, prenatal care, and degree of nutrition knowledge.Results: Among the 196 lactating mothers analyzed, the average vitamin A concentration observed in mature milk was 1.76±0.85 µmol/L and prevalence of vitamin A deficiency was observed in 20.5% mothers. There was no significant difference between vitamin A levels in maternal milk and the variables socioeconomic status and nutrition knowledge. Only 38.9% of lactating women presented enough vitamin A concentrations in milk for the infants' liver reserves (2.3 µmol/L). Conclusion:These findings reveal high prevalence of inadequate vitamin A nutritional status of mothers and infants, consistent with the national prevalence reported in women of childbearing age and Brazilian children, and that the intervention measures to fight this shortage should be extended to all pregnant and postpartum women, regardless of sociodemographic conditions and degree of nutrition knowledge, in order to improve the health of mother and child.J Pediatr (Rio J). 2012;88(6):496-502: Vitamin A, human milk, income, maternal education. ResumoObjetivo: Quantificar a concentração de vitamina A no leite maduro de nutrizes assistidas em maternidade pública no município do Rio de Janeiro e avaliar a sua relação com variáveis sociodemográficas e grau de conhecimento de nutrição.Métodos: Para a quantificação do retinol, foram coletadas amostras de 10 mL de leite maduro. Os pontos de corte adotados para identificação da deficiência de vitamina A e constituição de reserva hepática foram de < 1,05 µmol/L e ≥ 2,3 µmol/L, respectivamente. Foram avaliadas, ainda, as variáveis: grau de conhecimento de nutrição, sexo, idade, renda familiar, escolaridade, condições de saneamento básico, número de moradores na residência, idade materna e assistência pré-natal. Resultados:Participaram do estudo 196 nutrizes, com concentração média de vitamina A no leite maduro de 1,76±0,85 µmol/L e prevalência de 20,5% de deficiência de vitamina A. Não houve diferença na concentração de vitamina A no leite das nutrizes segundo as variáveis sociodemográficas e conhecimento de nutrição. Apenas 38,9% das nutrizes apresentavam concentração de vitamina A no leite suficiente para constituição de reserva hepática dos lactentes. Conclusão:Os achados aqui apresentados revelam alta prevalên-cia de inadequação do estado nu...

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“…Porém, diversos estudos apontam prevalências preocupantes de DVA fora da área de cobertura do programa, que precisam ser valorizadas 20,26,28 .…”

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Vitamin A concentration in mature human milk

Souza¹,

Saunders²,

Dolinsky³

et al. 2012

J Pediatr (Rio J)

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“…One relevant aspect of the present research would be the suggestion that milk be classified by lactation stage when supplied for consumption since vitamin A levels decrease as lactation progresses. 18 Taking into account the concentration of retinol found in the colostrum of low-income lactating women in the city of Natal RN which was 93.10 µg/100 ml, 23 and based on the results of the present study, it would be interesting if the colostrum and transition milk were only given to newborn babies during their first week of life since milk obtained during the initial stages of lactation offers greater quantities of vitamin A than mature milk. Such a measure would guarantee milk with an adequate vitamin A supply in keeping with the infants age.…”

Section: Discussionmentioning

confidence: 91%

Efeito do processamento do leite humano sobre os níveis de retinol

Ribeiro¹,

Melo²,

Pristo³

et al. 2005

J. Pediatr. (Rio J.)

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Objectives: To analyze the effect of processing on the vitamin A levels of milk that is donated to the Human Milk Bank at the University Maternity Hospital, and to evaluate whether this milk supplies the infants vitamin A requirement.Methods: Sixty milk samples from the Human Milk Bank were divided into two equal portions. One milk portion was extracted prior to processing, while another fraction was subjected to pasteurization and later extracted. The samples were analyzed using high performance liquid chromatography. Analysis with Students t test indicated that the difference between mean retinol levels was statistically significant at the p < 0.05 level. Results:The retinol content found in the milk prior to processing was 55.4±34.0 µg/100 ml, whereas for the processed milk this level was 36.6±26.1 µg/100 ml (p < 0.001).Conclusion: It was found that retinol loss occurs during milk processing and that the milk from the Human Milk Bank does not meet infants vitamin A requirement.

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“…Os níveis de retinol no colostro das puérperas analisadas foram inferiores aos observados em mulheres na Índia (131,6 µg/dL) e Alemanha (153 µg/dL) (11,12), e próximos aos valores encontrados em outro grupo na Índia (112 µg/dL), Cuba (102 µg/dL) e Brasil (93,1 µg/dL) (13)(14)(15). Entretanto, como esperado, o nível de retinol no colostro nas mulheres de Natal foi superior ao do leite maduro de lactantes do Sudeste brasileiro (40 µg/dL) (16).…”

Section: Discussionunclassified