Citric Acid
T. F. Allen - Encyclopaedia of Pure Materia Medica · Timothy Field Allen · 309 chars
General
Authority. W. Stevens, 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 was decidedly brought on by the excessive use of Citric acid, which an American gentleman had been recommended to use a preventive against the yellow fever .