According to scientific studies, the effects of soy on the cardiovascular system seem to be various. The Food and Drug Administration estimates that consuming 25g of soy protein per day can help reduce bad cholesterol. Phytoestrogens, present in soy, would also help to improve the lipid profile (Washburn, Wiseman) of patients. Soy is also a natural source of omega 3. This essential fatty acid, with a daily consumption of 2g, contributes to the maintenance of normal cholesterol levels.