Chronically malnourished children struggle to read and write simple sentences regardless of their level of schooling, according to research by Save the Children.
Eight-year-olds who are stunted by malnutrition are 19% more likely to make a mistake while reading a simple sentence, the report Food for Thought said.
Stunted children are 12.5% more likely to make a mistake writing a simple sentence and do 7% worse on basic maths questions.
The findings, based on research with thousands of children in Ethiopia, India, Peru and Vietnam, come 10 days before a global nutrition summit in London and ahead of this year's G8.
More top news
Witnesses will give evidence but the former Labour peer cannot be found guilty or be sentenced as he is too ill to put forward a defence.
The Home Office has been asked to prepare for cuts of between 25 and 40% by in the next 5 years.
The deposit box company raided in the the £10 million Hatton Garden jewellery heist is to close after its trade slumped.