Answer the following question given this paragraph: 

Glutathione is a low-molecular-weight compound found in living cells that is produced naturally by the liver. Healthcare providers give glutathione intravenously to prevent side effects of chemotherapy and to prevent kidney problems.


Q: Glutathione is a low-molecular-weight compound found in living cells that is produced naturally by what?

 Choices:

- blood

- brain

- amino acids

- liver

A:
liver
