Griesing's organization vigorously fought the move to phosphate-free until Washington State passed a law in March 2006 limiting the amount of phosphates in household dishwasher detergent sold in that state to 0.5%, or a trace amount, effective July 1, 2010 (in most of the state).

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"This is very exciting, clearly, because here we have somebody who can have anaphylaxis and deadly reaction from trace amounts, and you're converting this person into somebody who can tolerate a significant amount of the food, " said Dr. Anna Nowak-Wegrzyn, associate professor of pediatrics at Mount Sinai Medical Center in New York.

CNN: 'Exciting' advance reported in peanut allergy therapy