To get rid of neck fat you should eat a diet that is high in protein and healthy fats and low in processed carbohydrates. Cut out sugary drinks, pastries, and other high glycemic index foods. you should also concentrate on foods that are high in foods that promote collagen production, such as bone broth, broccoli, and organ meats. You should also include cosmetics in your skincare routine that include N-acetyl glucosamine and hyaluronic acid.