"The dose makes the poison" Condensed quote of Paracelsus von Hohenheim
Rathurue said:
"Everything consumed in excess becomes poison". Or as Mahatma Buddha said, 'Excess of anything in life is poison'.
That works for organic things, but some substances are toxic no matter the dose, such as lead. (Lead just builds up in the body. Even small amounts can cause health problems, if not ones immediately obviously caused by lead, while larger doses just degrade your brain with the size of the dose.)