Summary
It was experimentally established that para-aminobenzoic acid increases the survival of rats raised to high altitudes. Experiments performed on 114 rats with the addition of para-aminobenzoic acid to their food (200 mg per 100 g) demonstrated that the mortality rate of these animals decreased by half. A conclusion was drawn that para-aminobenzoic acid increases the resistance of the body to oxygen insufficiency.
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Udalov, I.F. Effect of procaine on tolerance of white rats to high altitudes. Bull Exp Biol Med 46, 967–968 (1958). https://doi.org/10.1007/BF00787336
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DOI: https://doi.org/10.1007/BF00787336