The paleo diet means avoiding processed foods, with an emphasis on natural ingredients and consuming a lot of protein. But what if this way of eating isn’t as perfect as it seems at first glance? Let’s look at the key weaknesses of the paleo diet, which are also confirmed by scientific research.

Is modern food really the same as Stone Age food?

The main idea of the paleo diet is to eat foods that our ancestors were familiar with – meat, fish, vegetables, fruit, nuts, and seeds. We exclude grains, legumes, dairy products, and all processed foods.

But here we encounter the first problem: the food available today is no longer the same as thousands or even millions of years ago. Today, we eat meat from animals that have been selectively bred, eat different diets, and live in artificial environments. Even the vegetables and fruit we buy in stores are far from the wild varieties that were once available to our ancestors.

According to research from the University of California, today’s apples contain up to 50% less nutrients than 50 years ago. Additionally, many types of vegetables have been genetically modified to be more resistant, larger, and sweeter. Although organic foods may be somewhat closer to the originals, they are hard to obtain and considerably more expensive.

High cost and food accessibility

The paleo diet requires the consumption of quality meat – preferably from animals that have been grass-fed and not treated with chemicals. But such meat is not cheap. The price of organic meat can be even twice as high as regular meat. For example, a kilogram of organic beef in Slovenia can cost more than 20 euros, while regular beef costs around 10 euros.

If the majority of the population switched to the paleo way of eating, it would have a big impact on the environment. According to data from the UN Food and Agriculture Organization (FAO), livestock farming already causes about 14.5% of all greenhouse gas emissions. Higher meat consumption would further raise this percentage and worsen the problem of global warming.

How does the paleo diet affect heart health?

Many turn to the paleo diet for quick weight loss. It’s true that reducing the intake of carbohydrates and sugars can lead to weight loss, but in the long term, the effects can be less positive.

Research published in The Lancet showed that a diet high in saturated fats – like the paleo diet – increases the risk of cardiovascular diseases. Red meat and animal fats contain high amounts of cholesterol, which can contribute to clogged arteries.

Data from research at Harvard University showed that people who eat a lot of red meat have an 18% higher risk of heart disease compared to those who eat more plant-based foods.

Increased risk of diabetes and cancer

Studies show that the paleo diet, due to its high content of red meat, can increase the risk of type 2 diabetes. Red meat contains certain compounds that can affect insulin resistance, which can lead to diabetes.

The World Health Organization (WHO) has also classified red meat as a potential cause of cancer. A meta-analysis from 2021 confirmed that people who regularly eat processed meats, such as sausages and salami, have a 20–30% higher risk of developing colon cancer.

Lack of fiber and micronutrients

The paleo diet excludes legumes and grains, which are a rich source of fiber. A lack of fiber can lead to digestive problems such as constipation and gut microbiome issues.

A 2019 study published in Nature showed that people who consume less than 15 grams of fiber a day are more likely to suffer from digestive problems and have a higher risk of colon cancer. The paleo diet can cause exactly this – due to the lack of legumes and whole grains, fiber intake drops significantly.

Moreover, the paleo diet restricts dairy products, which means lower calcium intake. Calcium is crucial for healthy bones and the prevention of osteoporosis, especially in women over 50. Research from Harvard showed that people who do not consume dairy products have a 30% higher risk of bone fractures.

Is the paleo diet really the right choice?

Although the paleo diet offers some benefits, such as avoiding processed foods and reducing sugar intake, it also has many drawbacks. High costs, potential negative effects on heart health, increased risk of diabetes and cancer, and lack of fiber are key arguments that should not be ignored.

As with any diet, it’s important to find balance. Instead of strictly following paleo rules, you can choose a more flexible approach – eating more natural, unprocessed foods, but also including whole grains and legumes for sufficient fiber and micronutrient intake.

Don’t be swayed by dietary trends without thorough consideration. Before deciding on any diet, consult a nutrition expert and ask yourself: Is this way of eating really sustainable and healthy for me in the long term?