Chlorophyll rush

Too much chlorophyll tends to make my 4.5 year old boy a tad hyperactive.
Same thing with chocolate, Sponge Bob on TV, fizzy drinks, lack of sleep, abundance of sleep, school, afternoons spent at home, city life, country life, the proximity of animals, machinery, cooking utensils, things that begin with the letter M, and B, and D or any word that contains a vowel, singing, talking, story telling.
He is quiet when he is fast asleep and on long car journeys.