Lactic Acid and Sweat Gland Function

SWEAT collected from normal male subjects carrying out work at high temperatures and humidities was analysed for chloride, lactic acid and urea. The osmotic pressure, as estimated by the freezing point in two hundred samples, is found to be accounted for by the osmotic pressure of these three constituents added together to the extent of about 95 per cent. Sodium chloride, on the average, accounts for about 80 per cent ; lactate accounts for about 11 per cent.