When a friend or relative tells you how much his or her cholesterollevel dropped after trying a particular diet, you may be tempted to try it yourself. If you do, and after a few months you discover that you're not getting the same benefits, you may need to chalk it up to genetic and physiological differences. There is no one-size-fits-all diet for cholesterol control. You may need to try several approaches to find one that works for you.Although diet can be a simple and powerful way to improve cholesterol levels, it plays a bigger role for some people than for others. Don't be discouraged if you have followed a diet but not reached your goal blood level. Keep it up. Even if you do end up needing medication to keep your cholesterol in check, you likely will need less than if you didn't make any dietary changes.