Resumo

CONDE, Arelis et al. Lactantes menores alimentados con fórmula de soya: Evaluación de Hormonas Tiroideas. Arch Venez Puer Ped [online]. 2009, vol.72, n.4, pp.129-134. ISSN 0004-0649.

Introduction and objective: Feeding with soy has been related to alteration of thyroid function. The objective of this study was to determine thyroid functionalism in babies under 6 months of age fed with infantile soy based formula. Methods: Descriptive, cross-sectional, non experimental study. Twenty eight babies who received exclusively infantile soy based formula were evaluated. Variables studied were: age, gender, socio-economical level, reason for the prescription of soy formula, dilution, daily ounces, determination of free T3, T4 and TSH. For the statistic analysis, Student’s t test  was applied for a statistical significance level of p< 0.05. Results: Serum free T3 and T4 were within normal ranges. 7% of the sample showed elevated levels of TSH, with no statistic significance. Conclusion: there was no statistical relationship between consumption of soy formula and thyroid function. However, two patients had increased levels of TSH and therefore, the possibility of an association cannot be ruled out given the small size of the sample.

Palavras-chave : Soy; isoflavonoids; thyroid function; infantile formula.