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Complete PICLE corpus of essays by Polish advanced EFL students (330,000)

/^t/One of the first scientists to take up the subject of nourishment seriously was an American scholar - prof. Keys. In the sixties he conducted an experiment with 34 volunteers who, for some time, were given food rich in calories but deprived of protein. The results were astonishing. After just a few days the characters of the volunteers changed drastically. The protein deficiency led to their becoming egoistic, suspicious and easily irritable.