Kombucha when sick might help boost your immune system, thanks to its probiotics and antioxidants. However, some people may find it too acidic or experience digestive discomfort.... moreKombucha when sick might help boost your immune system, thanks to its probiotics and antioxidants. However, some people may find it too acidic or experience digestive discomfort. Discover if kombucha is a good choice during illness.