London - A tiny daily dose of liquid peanut protein could save children from severe reactions to the food, doctors said.
Their trials on 48 highly allergic under-12s found that two thirds became able to tolerate small amounts of peanuts.
A quarter were even able to eat up to 20 kernels. Typically a tenth of a kernel would be enough to spark a reaction.
The under-the-tongue treatment could stop children falling ill from accidental exposure at a restaurant or a party.
"As a parent of two children with nut allergies, I know the fear parents face," said Edwin Kim, who led the University of North Carolina research reported in the Journal of Allergy and Clinical Immunology.