Impact of vitamin A megadose supplementation on the anthropometry of children and adolescents with non-hormonal statural deficit: a double-blind and randomized clinical study.
OBJECTIVE
To evaluate the intake of retinol and carotenoids, and their serum levels, as well as the impact of vitamin A supplementation on the anthropometry and body composition of children and adolescents with non-hormonal-related statural deficit.


METHODS
Double-blind, randomized trial of 46 pre-pubertal patients, between 4 and 14 years of age, with normal growth rates. The subjects were divided into two groups, each with 23 individuals (Group I: Placebo; Group II: Vitamin A in a single megadose), and were evaluated at moments A and B with a six month interval.


RESULTS
There were no statistically significant differences in serum retinol levels, anthropometry, growth velocity, or body composition, between moments A and B, in Group II. Carotenoids were significantly lower in Group I at moment B. The semi-quantitative food intake questionnaire showed that approximately 60.9% of the children and adolescents ingested less than half of the amounts of retinol and carotenoids recommended by the Food Guide Pyramid. Inadequate intake was more prevalent regarding vegetable and fruit carotenoid sources, with 75 and 70% of inadequacy, respectively.


CONCLUSIONS
If one considers the inadequate food intake observed in the dietary evaluation in this study, it is possible that multiple micronutrient deficiencies could be involved in statural deficits. This could explain why vitamin A supplementation does not seem to influence growth in children and adolescents with statural deficit, as indicated by the present study. Thus in populations such as the one studied here, the supplementation with vitamin A should be integrated into comprehensive nutritional interventions, so as to possibly promote greater positive impact on linear growth.
Sarni
Roseli Saccardo
RS
Discipline of Pediatrics of Faculty of Medicine, ABC Foundation, Santo Andre, Brazil. rssarni@uol.com.br
Kochi
Cristiane
C
Ramalho
Rejane Andrea
RA
Schoeps
Denise Oliveira
DO
Sato
Kazuê
K
Mattoso
Lilian
L
Pessotti
Cristiane Félix Ximenes
CF
Souza
Fabíola Isabel Suano
FI
Damiani
Flavia Maria
FM
Catherino
Priscila
P
D000293:Adolescent; D000886:Anthropometry; D001823:Body Composition / Q000187:drug effects / Q000502:physiology; D002338:Carotenoids / Q000008:administration & dosage / Q000097:blood; D002648:Child; D002675:Child, Preschool; D019587:Dietary Supplements; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D005260:Female; D006130:Growth Disorders / Q000097:blood / Q000178:diet therapy* / Q000517:prevention & control*; D006801:Humans; D008297:Male; D009752:Nutritional Status; D013997:Time Factors; D014801:Vitamin A / Q000008:administration & dosage / Q000097:blood / Q000494:pharmacology*
D014801:Vitamin A; D002338:Carotenoids