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Lecithin can be naturally consumed through a diet including lecithin rich foods such as egg yolk, soybeans, grains, wheat germ, fish, legumes, yeast, and peanuts. Commercial preparations of lecithin are also available.
Inclusion of Lecithin in one's diet does over the long run does help in decreasing cholesterol levels or gallstone problems.
But it does not help to prevent a gallstone attack, specifically when you take it with fat rich foods like pizza or burgers, etc.
No matter what supplement or drug you use for cholesterol control, be sure to get at least 30 minutes a day of aerobic exercise and reduce the amount of saturated fat and trans-fats in your diet.
Other beneficial lifestyle changes include drinking green tea, eating one clove of garlic per day (diced or crushed in food), and consuming more soluble fiber (such as oat bran), foods rich in omega-3 fatty acids (good sources include salmon, sardines and walnuts; or supplemental fish oil), and plenty of colorful fruits and vegetables.