Eating nothing but oatmeal for just two days might sound extreme, but it delivered a striking payoff in a new clinical trial. People with metabolic syndrome who followed a short, calorie-reduced oat-based plan saw their harmful LDL cholesterol drop by 10%, along with modest weight loss and lower blood pressure. Even more surprising, the cholesterol benefits were still visible six weeks later.
In the article, it states after two days of 300g of oatmeal per day + small amounts of fruits/veggies, beneficial effects to cholesterol were still measurable after 6 weeks of participants returning to their normal diet