Eat a healthy diet
You need to eat a nutritious, well-balanced diet, full of fresh foods, fruit and vegetables.
A good suggestion, that ticks all the boxes, is the Mediterranean diet, according to Dr Lee.
This includes eating more fibre to help you feel fuller for longer, reduce your appetite and reduce the absorption of cholesterol from the gut.
You should eat less processed foods such as ready meals, fatty meats, ham and sausages, high sugar cereals, cakes, biscuits, pastries, sweets, and fizzy drinks.
These foods are often high in saturated fat, sugar and salt, are high in calories and have little nutritional value.
Try to avoid trans fats and opt for unsaturated fats instead, which are found in vegetable oils such as olive oil, avocado, sunflower, rapeseed, or walnut oils.
Eat healthy carbs such as wholegrain bread, rice and pasta, and avoid white foods.
Increase your intake of omega-3 fats, which are found in fatty fish such as mackerel, herring, and sardines.