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Diet makes a difference in managing your cholesterol, but the diet that works is probably not what you would expect.
Eating Lots of Cholesterol Doesn't Always Cause High Cholesterol
In the late 1980s, the prestigious New England Journal of Medicine ran a clinical report of a man who was then 88 years old who had eaten 25 boiled eggs a day for 25 years. He had simply gotten into the habit of boiling a couple dozen eggs every morning instead of cooking.
When the Florida man's doctor finally became aware of his eating habits, he ordered tests for high cholesterol (which then were not as common as they are now). To the doctor's astonishment, the tests came back with normal total cholesterol, normal LDL cholesterol, and normal triglycerides, and there were no signs of cardiovascular disease. How could this possibly be?
Even if you eat tremendous amounts of cholesterol (the man in this medical report consumed as much cholesterol in a single day as some diets recommend for 3 months), the small intestines are capable of transporting only a limited amount of it into your bloodstream. The rest is dissolved into fecal matter and flushed away with other waste. But that doesn't mean that eating anything you want is OK if you have a problem with high cholesterol.
More Than One Diet Works For Lowering Cholesterol
One way to lower your cholesterol is to eat fewer high-cholesterol foods. This approach works if you don't have particularly high cholesterol. Eliminating essentially all the cholesterol in the foods you eat typically lowers cholesterol levels about 15%, which is about what you would expect because food provides about 20% of the cholesterol in the bloodstream (except in people who have hereditary conditions that cause greatly increased production of cholesterol, such as familial hypercholesterolemia). No eggs, no fatty meats, no organ meats (especially liver), no full-fat dairy products of butter, and certainly no bacon are the rule. Avoid these foods and your cholesterol levels should go down.
Another way to lower cholesterol is to dissolve it by consuming more fat, but not just any fat. People who consume large amounts of olive oil, peanuts, or nuts (up to the equivalent of 100-200 extra calories a day) also enjoy lower cholesterol levels because of the like dissolves like principle. The liver can send cholesterol into the bloodstream, or it can send it into the bowels. Eating lots of plant fat dissolves cholesterol (that's an oversimplification, it actually changes some of the chemical characteristics of a kind of cholesterol known as VLDL cholesterol, but the effect is similar to "dissolving" it) so that it is shunted to into the gallbladder to be sent on to the small intestine and out with fecal matter. Eating extra plant fat to lower your cholesterol isn't quite as effective as eating fewer high-cholesterol foods, but it can also lower cholesterol levels about 14-15%. Eating more peanut butter, about an ounce (30 g) a day gets similar results.