The contribution of plant foods to the vitamin A supply of lactating women in Vietnam: a randomized controlled trial.
Am J Clin Nutr
; 85(4): 1112-20, 2007 Apr.
Article
em En
| MEDLINE
| ID: mdl-17413113
ABSTRACT
BACKGROUND:
More information is needed on the efficacy of carotenoids from plant foods in improving vitamin A status.OBJECTIVE:
We aimed to quantify the efficacy of provitamin A-rich vegetables and fruit in improving vitamin A status.DESIGN:
Breastfeeding women in 9 rural communes in Vietnam were randomly allocated to 1 of 4 groups the vegetable group (n = 73), which ingested 5.6 mg beta-carotene/d from green leafy vegetables; the fruit group (n = 69), which ingested 4.8 mg beta-carotene/d from orange or yellow fruit; the retinol-rich group (n = 70), which ingested 610 microg retinol/d from animal foods and 0.6 mg beta-carotene/d; and the control group (n = 68), which ingested 0.4 mg beta-carotene/d. Meals of groups 1, 2, and 4 contained <30 microg retinol/d. Lunch and dinner were provided 6 d/wk for 10 wk.RESULTS:
Mean (95% CI) changes in serum retinol concentrations of the vegetable, fruit, retinol-rich, and control groups were 0.09 (0.03, 0.16), 0.13 (0.07, 0.19), 0.25 (0.17, 0.33), and 0.00 (-0.06, 0.06) micromol/L, respectively. Mean (95% CI) changes in breast-milk retinol concentrations were 0.15 (0.04, 0.27), 0.15 (0.02, 0.28), 0.48 (0.32, 0.64), and -0.06 (-0.21, 0.09) micromol/L, respectively. According to these findings, the equivalent of 1 microg retinol would be 12 microg beta-carotene (95% CI 8, 22 microg) for fruit and 28 microg beta-carotene (17, 84 microg) for green leafy vegetables. Thus, apparent mean vitamin A activity of carotenoids in fruit and in leafy vegetables was 50% (95% CI 27%, 75%) and 21% (7%, 35%), respectively, of that assumed.CONCLUSION:
The bioavailability of carotenoids from vegetables and fruit is less than previously assumed.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Verduras
/
Vitamina A
/
Lactação
/
Frutas
/
Leite Humano
Tipo de estudo:
Clinical_trials
Limite:
Adult
/
Female
/
Humans
/
Infant
País/Região como assunto:
Asia
Idioma:
En
Revista:
Am J Clin Nutr
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Vietnã