This polyphenol newsletter does not subscribe to conspiracy theories. Yet, it is a fact that there is a massive industry making money out of fattening people with poor food and subsequently helping them. That help ranges from an array of (often non-effective) diets, bariatric surgery, ozempic and similar medicines and, ofcourse, medication against high blood pressure, high cholesterol, diabetes and many other obesity-related diseases.
Overweight and obesity, are weighty problems in almost all countries. They are a significant driver of increased healthcare spending. Being overweight increases the likelihood to develop health complications such as:
Type 2 Diabetes (mainly caused by insulin resistance)
Heart Disease and Stroke (mainly caused by high blood pressure and unhealthy cholesterol levels)
Certain Cancers
Sleep Apnea
Osteoarthritis
Fatty Liver Disease (Metabolic Dysfunction-Associated Steatotic Liver Disease - MASLD, formerly NAFLD)
Mental Health Issues (obesity contributes to mental health problems such as depression, anxiety, and low self-esteem due to societal stigma and body image issues).
At its most fundamental level, the main cause of obesity is a sustained energy imbalance where calorie intake consistently exceeds caloric expenditure. That is the long term view. Yet, even people who restrict calorie intake, still find it difficult to shed weight. Why?
Gutted
This is where the functioning of the gut comes into play. Not for nothing, scientists refer to the gut as the second brain. Our gut is a tremendous complex system, that does not function as simple as “shortage of calories equals fat consumption”.
The Mediterranean Diet (note that “lifestyle” would be a better term) appears to deliver fewer people with overweight and obesity. That is because the Med Diet has a focus on whole, unprocessed foods. The cornerstone of the Mediterranean diet is a high intake of fresh fruits, vegetables, legumes (beans, lentils), nuts, seeds, and whole grains. These foods are naturally rich in fiber, vitamins, and minerals, and tend to be less calorie-dense than processed foods. This food is rich in fats. However, they are healthy, unsaturated fats, rich in polyphenols.
Polyphenols
Polyphenols are naturally occurring compounds found in plants that have gained attention for their potential role in preventing and managing obesity. They exert their anti-obesity effects through a variety of complex mechanisms, often working synergistically. The main effects of polyphenols on moderating a personś weight are:
Modulating Gut Microbiota
Polyphenols interact with the gut microbiota. They can promote the growth of beneficial gut bacteria while inhibiting pathogenic ones, leading to a healthier gut environment. This has a huge influence on the absence of obesity.
Reducing Inflammation and Oxidative Stress
Obesity is often associated with chronic low-grade inflammation and oxidative stress. Polyphenols are potent antioxidants and anti-inflammatory agents. By mitigating these factors, they can improve overall metabolic health and reduce the adverse reactions associated with obesity, such as insulin resistance.
Improving Insulin Sensitivity
Polyphenols enhance insulin sensitivity, allowing cells to take up glucose more efficiently. When insulin sensitivity is low, a polyphenol rich diet will restore this to normal. This helps regulate blood sugar levels.
Inhibiting Digestive Enzymes and Nutrient Absorption
Polyphenols can inhibit the activity of digestive enzymes like pancreatic lipase and fatty acid synthase, which are crucial for breaking down and absorbing dietary fats. By doing so, they can reduce the amount of fat absorbed from the gut. Some polyphenols can also inhibit enzymes like alpha-amylase and alpha-glucosidase, which are involved in carbohydrate digestion. This can lead to a slower release of glucose into the bloodstream, reducing fat storage.
Modulating Lipid Metabolism
Polyphenols can interfere with the pathways involved in creating new fat cells (adipogenesis) and synthesizing lipids. They can inhibit the expression of genes and transcription factors that promote fat formation. They can also stimulate the breakdown of stored fats (triglycerides) in adipose tissue. Polyphenols furthermore promote the burning of fatty acids for energy, particularly in the liver and muscles. Certain polyphenols can inhibit enzymes involved in cholesterol synthesis, helping to manage lipid levels.
Increasing Energy Expenditure and Thermogenesis
Polyphenols can increase the body's heat production (thermogenesis), particularly by activating brown adipose tissue (BAT), which is specialized in burning calories to generate heat. This leads to increased energy expenditure. BAT (“brown fat”) is common among people who played a lot outdoor in their childhood.
Lasting effects
A study in a 2022 issue of the journal Nutrition Research found that adults who lost a substantial amount thanks to adhering to the Mediterranean diet, had an easier time maintaining their weight loss a year later than those who followed other dietary patterns.
The Mediterranean diet also may help with weight management over time. A study in a 2024 issue of the journal Nutrients found that adults in Greece who closely adhere to the Mediterranean diet are significantly less likely to gain weight over the course of 20 years.
Another benefit of focusing on polyphenol-rich nutrition is that it contributes to muscle development and reapir of joints and cartillage. Exercise becomes less painful, which helps to pick up that essential other side of the calorie-coin.
The Fat that Slims
Since (fresh, polyphenol-rich) olive oil is such an important pillar of the Med Diet, it is interesting to note that this calorie-dense fat fights overweight and obesity. Studies of weight loss and maintaining an appropriate weight, show that users consume up to 1 liter of olive oil (i.e. over 8,000 kcal) per month. It underscores that a strict focus on calories is for many people not the appropriate approach. Improving gut health is.
In cooperation with villa-evoo.com we have an offer for you: take a paid, annual subscription and receive two bottles of extremely healthy, polyphenol-rich olive oil for free. You support our research. In return, you enjoy the polyphenolic benefits of a delicious olive oil.