Although both oats and wheat contain fiber, wheat has more insoluble fiber compared to oats. Insoluble fiber helps prevent constipation, while soluble fiber helps lower cholesterol. There are two types of cholesterol – a good HDL cholesterol and a bad LDL cholesterol. LDL cholesterol contains small dense LDL cholesterol , one of the leading factors of a heart attack.

Bad cholesterol - LDL builds up in the inner walls of the arteries supplying blood to heart and brain. LDL forms plaque or a hard deposit that narrows the arteries and reduces flexibility, a condition known as atherosclerosis. Heart attack or stroke may result when a clot blocks arteries.

Oats contains soluble fiber that dissolves in water. A typical intake of 50 grams to 100 grams of whole oats a day can give 2.5 to 5 grams of soluble fiber.

Some common side effects of oat consumption are – bowel movement, flatulence and reduced absorption of cholesterol lowering drugs like Lipitor. You should always consult your doctor before starting oat diet to lower cholesterol if you are taking any medications.