How to reduce high cholesterol at age 56?

General Aerobic exercise (jogging, walking fast, biking). Her diet should be free of processed fats..though certain monounsaturated fats (like the kind that is found in olive oil) is quite healthy.

If her cholesterol is extremely bad, I would reccomend she starts on an medication.

In your search engine type in "foods to lower cholesterol" and you'll find all that you need.  The American Heart Association has a great online cookbook for meals, if you're interested type in "Delicious Decisions cookbook" it's great, I make copies of these recipes and put them in our gym for members.
Most any kind of exercise will lower the cholesterol, providing it is done on a consistent basis. Sometimes it's hereditary too, and one might need to exercise and still take meds, but most of the time exercise and diet will do the trick.

The best things are to eat healthy.  Fruits and vegetables and low or no cholesterol foods a lot of foods we eat  are sort of high in cholesterol so you need to eat in moderations.  and exercise everyday.  Medications to lower cholesterol are used if eating right and exercise dont work.

well the way you get bad cholesterol is by eating it.  Cut that out of the diet.  Eat more dietary fiber and whole grains.  There are also many supplements that lower cholesterol.  I have been taking L-Carnitine for energy this summer, and one of the side effects is lowering cholesterol.  My total cholesterol was 99 a month ago at my blood test.  I would say listen to you doctor, and possibly see a nutrionist.  I am a 19 year old College Student, clearly I do not live the healthiest life style.  Good luck though.