Still no stones. What is causing the high cholesterol and high blood pressure?

My mother, 65 years old, has done 4 different Liver Flushes in the past few years but tiny stones came out only on the 1st flush. Subsequent flushes have produced no stones.

She has high (diastolic) blood pressure, and high cholesterol and "THICK BLOOD". I heard high diastolic BP is from the arteries becoming hard and not being able to flex out to decrease blood pressure after systole. This could be due to toxin accumulation, is what I've heard. I figure the high cholesterol is a liver problem since the liver produces cholesterol, am I wrong? Are there other causes?

Does she need a kidney cleanse? She drinks at least 7 cups of water a day.

She is very careful about what she eats, she stays away from processed salt, she juices fruits, she eats whole grains and oatmeal, she takes vitamins, has been de-wormed and detoxed by me many times, etc.

Does anyone have a clue as to what can help her?

Thanks.