1946, William C. Bridges et al., “Low-Sodium Diet and Free Fluid Intake in the Treatment of Congestive Heart Failure — A Preliminary Report”, in The New England Journal of Medicine, volume 234, →DOI, →OCLC, page 574:
The last-named worker advocates the use of extremely large rations of water — 5000 to 6000 cc. a day — and a low-sodium, neutral-ash diet as a means of controlling cardiac edema.
1996, Rosalinda T. Lagua, Virginia S. Claudio, “Diet, ash”, in Nutrition and Diet Therapy Reference Dictionary, 4th edition, Springer, →ISBN, page 83:
Foods that have no effect on urine pH are neutral-ash foods.
