White grain or whole grain bread less harmful for Plasma Uric Acid? Question You find contradictions in reading websides about white bread and whole grain bread for plasma uric acid. Please give your opinion: white bread or whole grain bread is less harmful? Answer October 3, 2007 By Jon Giles, MD Plasma uric acid levels depend on the metabolism of purines from the diet, which typically derive from proteins. Breads, being low in proteins, do not typically raise serum uric acid levels.