Oats, along with barley, are the best source of a kind of soluble fiber called beta glucan. Beta glucan helps lower bad cholesterol (LDL). So, when you see a healthy claim on oat products, believe it.
Oat fiber helps control blood sugar and improves insulin sensitivity.
Oats contain phytochemicals such as saponins and other antioxidants that may also help reduce the risk of heart disease. They may also help relax blood vessels and maintain blood flow.
All forms of oatmeal (such as old-fashioned, instant, steel-cut) are whole grains and are similarly nutritious. But "oatmeal breads" barely have enough oatmeal to allow them to maintain that healthy image, but not enough for actual health.