The balance of intestinal bacteria greatly affects health.

What kind of liquid is in this bottle?

What kind of liquid is in this bottle?

He received the letter challenging him to a duel and began preparing for the duel.

Gender roles are an important element in defining individual behavior in society.

His role is to fulfill his responsibilities as a leader.

It is important to understand the importance of health.

Last night, I overate and suffered from indigestion.

My digestive organ is healthy.

Dietary fibre is important for maintaining a healthy digestive system.