My husband has high levels of ldl cholesterol, 146 ldl. diet is great. could it be genetic, if so is there a test?

High LDL Cholesterol: Diet is not the only cause of elevated cholesterol. Cholesterol is mobilized as a healing molecule, and is elevated if the body is having inflammation. If he inflammation is in the arteries this leads to vascular disease, stroke, and heart attack. Decreasing sugar and processed foods helps, exercise, and anti-inflammatory herbs. Statin drugs also lower inflammation. Berkley cholesterol panel.

Probably genetic: The genes contribute more than lifestyle, though we all talk about the latter because we can do something about it. The genes are being discovered and probably aren't worth knowing. If diet and exercise aren't lowering it to what his physician thinks best, don't hesitate to start on a statin or some other medicine that's appropriate. He's fortunate to have a wife who cares. Best wishes.