Fasting is required on Ash Wednesday and Good Friday for the ages of 18 to 59
How do we fast?
When fasting, a person is permitted to eat one full meal, as well as two smaller meals that together are not equal to a full meal

Abstinence Everyone from age 14 and up must abstain from consuming meat

Am I excused from fasting and abstinence?

Those that are excused from fast and abstinence outside the age limits include the physically or mentally ill including individuals suffering from chronic illnesses such as diabetes. Also excluded are pregnant or nursing women.