What nutrition does hyperlipidemia eat?

Hyperlipidemia belongs to cardiovascular and cerebrovascular diseases. My grandfather has been suffering from hyperlipidemia for two years. He usually tries to eat less food with high animal viscera and fat and exercise properly. He is still eating a health product called Condoleezza fish oil. Fish oil is a pure natural health care product, which can remove junk toxins from blood vessels, promote blood circulation, dredge and soften blood vessels, help to treat hyperlipidemia, balance blood lipids and improve human immunity. Now that Grandpa is well, dizziness and headache are common. I hope you can help me.