Bacteria is something else that you would need to know
Answer:
He probably suffers from lactose intolerance.
Explanation:
Suffering from lactose intolerance doesn't mean you have to eliminate all kind of lactose from your diet, will depend on the degree of intolerance of the person and the food, since not all lactose have the same concentration
. For example yogurts go through a fermentation process, and have a low lactose concentration, with cheeses, it is recommended to consume those with a greater degree of maturity, since the greater the maturity the less amount of lactose they will contain.
It came from Robert Hooke
They deal with blood, so like drawing blood
