Oats May Significantly Lower Cholesterol in Just Two Days

Recent research indicates that even a short-term diet incorporating oats can lead to noticeable improvements in cholesterol levels. A study from the University of Bonn in Germany focused on adults with metabolic syndrome—conditions linked to diabetes, such as high body weight and elevated blood pressure.

The study involved 32 participants who followed a low-calorie regimen that consisted primarily of 300 grams of pre-cooked oatmeal three times daily. They could only add fruits and vegetables to their meals, consuming about half of their regular caloric intake. Meanwhile, a control group was placed on a similar calorie-restricted diet without oats. Both groups saw benefits, but those consuming oats experienced a “significant” improvement in cholesterol levels, which remained stable even after six weeks.

Marie-Christine Simon, an associate professor at the Institute of Nutrition and Food Sciences at the University of Bonn, noted a 10% reduction in LDL, or “bad” cholesterol levels for the oatmeal group. She commented that while the results may not equate to those achieved with modern medications, they are still substantial. Interestingly, participants also lost an average of 2 kilograms and had mildly lowered blood pressure.

The research suggested that this oatmeal diet likely positively influenced gut microbes, which may have contributed to these improvements. The study’s findings were published in Nature Communications.

Simon pointed out that incorporating oatmeal into one’s diet on a regular basis could maintain cholesterol levels within a healthy range and potentially help prevent diabetes. Future research may explore whether repeated short-term oatmeal diets every six weeks can provide lasting benefits.

Robin DeCicco, a holistic nutritionist who was not part of the study, echoed the findings, remarking that oats are known for their cholesterol-lowering properties due to their prebiotic fiber content, which nourishes beneficial gut bacteria. This stimulation of gut bacteria can help reduce LDL cholesterol production.

DeCicco also mentioned that oats are a whole grain, low in saturated fat, high in fiber, and a good source of plant-based protein—attributes that align well with heart-healthy diets.

However, she cautioned those with diabetes or pre-diabetes to approach oat consumption carefully, as oats are high in carbohydrates. She suggests opting for low-starch, high-protein, and high-fiber foods while obtaining carbohydrates from vegetables and nuts.

Megan Roe, a dietitian, noted that regular oat consumption seems to lower cholesterol across various populations, with the best results observed in those with elevated levels. Yet, for individuals unaccustomed to high fiber, introducing oats too quickly might cause digestive discomfort.

For those needing gluten-free options, it’s important to choose certified gluten-free oats. Additionally, Roe raised concerns about oatmeal being high on the glycemic index due to common preparations with added sugar or fruits. Her recommendation includes opting for steel-cut or rolled oats sweetened only with fruit or low-glycemic alternatives like monk fruit.

She also advised incorporating proteins, such as chia or flaxseeds, protein powder, or Greek yogurt, to achieve a balanced meal.