Food as Medicine – Ways Diet Can Promote Health

The concept of employing food as a health-promoting element is not new, its roots can be traced back to ancient times. Emphasizing the role of diet in maintaining health was a key assumption already in antiquity. The father of medicine, Hippocrates, proclaimed the motto 'Let food be your medicine and medicine be your food'. A similar view was also prevalent in ancient China and India, where diet was also considered a component of therapy and attributed with healing and prophylactic properties. Together with the development of science and modern medicine, interest in dietary health has decreased in favor of pharmacotherapy. However, the past decades have brought a return to a holistic approach, in which diet is considered an indispensable component of health prevention. Current scientific research confirms that a diet composed of natural and unprocessed products can reduce the risk of chronic diseases such as type 2 diabetes, heart disease, or cancer. The philosophy Food as Medicine is based on the belief that what we eat has a direct impact on the functioning of our body and its ability to self-regulate. The modern approach combines ancient traditions with knowledge about the gut microbiome, antioxidants, and anti-inflammatory properties of some dietary components. More and more doctors and dietitians promote conscious eating as the basis of healthcare, contributing to a global increase in the popularity of this trend.

Diet plays a fundamental role in the operation of the body, providing necessary nutrients that benefit metabolic processes, immunity and health in general. In line with the Food as Medicine approach, it is emphasized that a carefully planned diet can promote health in various ways.

Chronic inflammation in the body can lead to the development of various conditions such as diabetes, asthma, or autoimmune diseases (V. P. Chavda, J. Feehan, V. Apostolopoulos 2024). A carefully selected diet can help to reduce it by providing anti-inflammatory and antioxidant ingredients. These include, among others, green leafy vegetables (e.g. spinach, cabbage, rocket), fatty seafood (cod, mackerel, sardines), berries (blueberries, raspberries, strawberries), seeds and nuts, spices and herbs (m. i. m., turmeric, ginger, cinnamon, oregano) and unsaturated fatty acids (olive oil, avocado, flaxseed). Their positive effect results from the content of flavonoids, polyphenols, anthocyanins, omega-3 fatty acids, fiber, and vitamins C and E, which support the body by neutralizing free radicals, regulating inflammation and strengthening the immune system. The regular inclusion of these products in the diet can help to prevent chronic diseases, support the cardiovascular system and improve overall health (A. Scheiber, V. Mank 2023).

A tailored diet plays a significant role in strengthening the immune system, supporting the body in warding off infections and speeding up the recovery process. Nutrients in food support the production of immune cells, regulate inflammatory responses, and protect against damage caused by oxidative stress. Fruits and vegetables rich in vitamin C (citrus, bell pepper, kiwi, strawberries) stimulate the production of white blood cells and strengthen the body's natural defenses. Fermented foods (yogurt, kefir, sauerkraut) provide probiotics that positively affect the gut flora, creating a foundation for a strong immune system. Fatty seafood and seafood are excellent sources of omega-3 fatty acids and zinc, which regulate inflammatory processes and strengthen the immune system. Nuts and seeds provide vitamin E and selenium, which protect cells from oxidative stress. It is also important to remember natural antibiotics such as garlic, ginger, turmeric, and oregano, which have antibacterial properties and support the body in fighting pathogens (E. A. Miles, P. Calder, C. E. Childs 2020).

The gut microbiome, a collection of microorganisms residing in the gut, plays a significant role in maintaining health by supporting the immune system, digestion, and vitamin production. Disruptions in the balance of the microbiome can lead to various health problems, so it is particularly important to take care of it (Fan, Pedersen 2020). To support the microbiome, it is advisable to incorporate probiotic and prebiotic products into the diet (components that promote their growth). Fermented products such as yogurt, kefir, sauerkraut, and kimchi are a natural source of probiotics. Fiber, present in fruits, vegetables, whole grain products, and legumes, plays the role of prebiotics, which additionally supports a healthy gut microbiome (Bibbò et al. 2016).

Proper nutrients in diet play a crucial role in maintaining stable blood glucose levels, which is highly important for preventing type 2 diabetes. Many products support this process by enhancing tissue sensitivity to insulin and slowing down glucose absorption. Fiber, found in whole grain products, vegetables, or legumes, allows for gradual release of glucose into the bloodstream by slowing down carbohydrate digestion. Omega-3 fatty acids, found in nuts and seeds, can improve cell response to insulin (F. O. Martins, S. V. Conde, 2022). Polyphenols, present in berries such as blueberries and chokeberries, have a beneficial effect on carbohydrate metabolism by improving insulin sensitivity of tissues, reducing blood glucose levels, and stimulating the pancreas to release insulin (R. Naz et al., 2023).

Appropriate nutrition has a significant impact on mental health – it can affect mood, stress levels, and emotional adaptability. Many researches confirm that suitable nutrients can support brain and nervous system health, which leads to improved well-being (A. Loughman et al. 2021). Omega-3 fatty acids play a crucial role in brain and nervous system function, which may also have a favorable effect on mild symptoms of depression or anxiety. Some researches indicate a correlation between the consumption of dietary fiber and the risk of depression. A diet rich in vitamin B12, vitamin D, and folic acid (found in green leafy vegetables, eggs, and liver) can play a role in preventing depression and improving overall well-being (A. Loughman et al. 2021), while magnesium may help in reducing anxiety and improving sleep quality (A. Botturi et al. 2020).

Although food is not a medication in the literal sense, it plays a significant role in health prevention that helps prevent civilization's diseases. A correct diet can support the body's immunity, regulate inflammatory processes, and have a positive impact on the way the body functions. In certain cases of illnesses, such as irritable bowel syndrome, SIBO, or high blood pressure, the type of nutrition plays a crucial role in therapy by reducing symptoms and improving quality of life. While food cannot replace medication when it is indispensable, it can be an effective support in treatment and one of the most important tools in healthcare.