Ash Wednesday and Good Friday are days of fast and  abstinence from meat.  Fridays of Lent are also days of abstinence.

Fasting is to be observed by all of the faithful who are 18 years of age and older, who have not yet celebrated their 59^th birthday.  On a fast day, one full meal is allowed.  Two other meals, sufficient to maintain strength, may be taken according to each person’s needs, but together they should not equal another full meal.  Eating between meals is not permitted, but drinking liquids, including milk and juices, is allowed.  Obviously if food is necessary with the taking of medicine, that is permitted.

Abstinence is observed by all persons 14 years of age and older.  On days of abstinence, no meat is allowed.  Note that when health or ability to work would be seriously affected, the law does not oblige one to
abstain from meat.  When in doubt concerning fasting and abstinence, the parish priest should be consulted.