Metamucil, a product designed to add this to the diet, also helps lower cholesterol
[DOC] [TLE] Effectiveness of altering serum cholesterol levels without drugs - NCBI [PAR] This review examines a variety of dietary strategies designed to lower lipid levels, 
... diet, the Ornish diet, the Mediterranean diet, exercise, phytosterols, fiber, soy 
products, and fish oil.