[Seasonal variations in ascorbic acid concentration in children from Mexico City]. / Variación estacional en la concentración de ácido ascórbico en niños de la Ciudad de México.

With the purpose of finding out whether the concentration of ascorbic acid in the serum in children suffered significant variations through the different months of the year, 301 blood samples were studied; 108 were studied in the month of January; 92 in the month of May and 101 in September. No statistically important difference was found after comparing the averages corresponding to the 3 samples studied. However, the analysis of the concentration of ascorbic acid in terms of the ages of the patients showed an unquestionable seasonal variation in the sera corresponding to children under 3 years of age. This same age group showed the most significantly low averages through the different stages of the calendar year.