Herbert George Wells: The Food of the Gods and How It Came to Earth

"Hoping to create a new growth agent for food with beneficial uses to mankind, two scientists find that the spread of the material is uncontrollable. Giant chickens, rats, and insects run amok, and children given the food stuffs experience incredible growth--and serious illnesses. Over the years, people who have eaten these specially treated foods find themselves unable to fit into a society where ignorance and hypocrisy rule. These "giants," with their extraordinary mental powers, find themselves shut away from an older, more traditional society".