A cardiologist has issued a warning about a popular protein-rich diet that could compromise heart health, as many people make one crucial error.
Keto Diet and Heart Risks
The 'keto' or ketogenic diet is a high-fat, low-carbohydrate and protein-heavy eating plan designed to alter how the body generates energy. When carbohydrates aren't available for the body to utilise for fuel, it triggers a metabolic state called 'ketosis'. However, a cardiologist has cautioned that the way numerous keto followers implement the diet is endangering their cardiovascular health.
Dr Francesco Lo Monaco, a private cardiologist in London and founder of the National Heart Clinic, said: "The ketogenic diet has gained mass popularity as a weight-loss plan, but many fail to realise the associated risks. The diet's foundations in being high-fat can raise levels of LDL or 'bad' cholesterol, meaning it's not suitable for people who already have issues."
"Even for those with average cholesterol levels, increasing LDL can put a strain on any heart. But a common mistake is adopting this diet for too long. Keto is an extreme diet which should only be done short-term. While focusing on meat and cutting carbs, dieters are restricting the body from other key nutrients, which is not suitable long-term."
Fat Quality Matters
He added that the variety of fats consumed on keto also significantly impacts cardiovascular risk. "People often assume all fats are equal, but that's not the case," Dr Lo Monaco said.
"A diet high in saturated fats from processed meats, butter and cheese can increase inflammation and contribute to plaque build-up in the arteries. In contrast, healthier fats - such as those found in olive oil, nuts, seeds and oily fish - are far more beneficial and should be prioritised if someone does choose to follow a low-carb plan."
Weight Fluctuation Concerns
Dr Lo Monaco, who is also the author of Heart Saviour, emphasised that while some people may experience rapid weight loss on keto, this is often hard to sustain and can trigger a cycle of weight fluctuation.
He said: "Short-term results can be motivating, but sustainability is key when it comes to both weight management and heart health. Many people regain the weight once they reintroduce carbohydrates, which can be frustrating and counterproductive."
A Better Alternative
Rather than keto, he advocates focusing on more balanced, evidence-backed approaches that promote long-term wellbeing.
"The Mediterranean diet is one of the best options for heart health. It includes plenty of vegetables, fruits, legumes and healthy fats, alongside moderate amounts of fish and lean protein. It's not restrictive, and it's far easier to maintain."
