One of those options contains an ingredient familiar in that which isn’t recommended.
Oats and barley are rich in a type of fibre known as beta glucan; this forms a gel in the body that binds to cholesterol-rich acids.
Much like foods with sterols and stanols, this limits the amount of cholesterol absorbed into the body.
Nuts, also high in sterols and stanols, are high in cholesterol absorbing fibre and are a rich source of protein, vitamin E and other compounds the body needs to function.