Citric Acid
Allen, Supplement to the Encyclopedia of Pure Materia Medica, 1879, Vol. X, p. 470
Authority. W. Seven, On the Blood, p. 451.
During a residence of twenty years in the West Indies I have only seen one case of scurvy, and that case teas decidedly brought on by the excessive use of Citric acid, which an American gentleman had been recommended to use as a preventive against the yellow fever.