A plant-based eating plan, known as the Portfolio diet, may lower LDL cholesterol by as much as one-third within a month, a development that could offer an alternative or supplement to statin medication for millions. High cholesterol, a condition affecting over half of adults in the UK and around 92 million people in the US, leads to plaque buildup in arteries, increasing the risk of heart attack, stroke, and dementia.
While statins are widely prescribed to manage cholesterol, they are not effective for everyone, with roughly half of patients failing to reach healthy levels after two years. Common side effects of statins include muscle pain, digestive issues, and headaches. The Portfolio diet, developed by Canadian researchers, focuses on four key food groups: viscous fiber, plant proteins, unsaturated fats, and plant sterols.
Studies indicate that combining these components can significantly reduce LDL cholesterol. Dr. David Jenkins, professor of nutritional sciences at Toronto University and creator of the diet, explained that this approach works similarly to a financial portfolio, employing multiple strategies to maximize benefits. Research suggests the diet can lower LDL cholesterol by up to 35 percent in one month, comparable to the effects of some statin medications. A Harvard study following nearly 210,000 health professionals over 30 years found that adherence to the Portfolio diet was associated with a 14 percent lower risk of cardiovascular disease.
Viscous fiber, found in foods like oats, barley, beans, lentils, and certain fruits, forms a gel in the digestive tract that binds to cholesterol and bile acids, preventing their absorption. Plant proteins, such as tofu and tempeh, along with nuts and seeds, appear to reduce cholesterol production in the liver. Unsaturated fats, like those in olive oil, and plant sterols, found in nuts and fortified foods, further aid in blocking cholesterol absorption.
Beyond cholesterol reduction, the Portfolio diet has been linked to other health benefits. A 2023 Canadian study found that post-menopausal women following the diet had a 31 percent reduced risk of type 2 diabetes. Nutritionist Rhiannon Lambert noted that while not designed as a weight-loss plan, the diet's high fiber content can promote satiety, potentially aiding in appetite regulation and weight management for some individuals.
Experts emphasize that individuals currently taking statins should not discontinue their medication without consulting a healthcare provider. Dell Stanford, senior dietician at the British Heart Foundation, stated that for those with existing cardiovascular disease, statins are often essential for reaching target cholesterol levels. However, for generally healthy individuals aiming to maintain lower cholesterol, the Portfolio diet presents a promising dietary strategy. The diet's flexibility allows for personalization based on individual preferences and needs, making it adaptable to various lifestyles and cultural backgrounds.