Dietary recommendations for people with depression

Depressive disorder represents a complex array of mental health conditions with a multifaceted etiology. Ongoing investigations into its origins have established it as a heterogeneous condition, the progression of which is shaped by numerous internal and external factors. Estimates suggest that in Poland, one in ten individuals experiences mental health issues, with women being twice as likely to develop depressive disorder as men. However, it is important to note that this disparity may be influenced by the fact that women are more inclined to seek professional medical assistance than men.

The gut is increasingly recognized as the "second brain." Processes occurring in the digestive system impact our well-being and mood. A new medical field, neurogastrology, has emerged to study this connection. Research confirms a strong link between the nervous and digestive systems. Gastrointestinal disorders may contribute to the development of depression and other mental health conditions. Over 90% of serotonin is produced in the gut by gut microbiota. Disruptions in bacterial balance (dysbiosis) lead to elevated levels of pro-inflammatory cytokines, which can trigger depressive symptoms. Patients with mental health disorders often experience improved treatment outcomes when anti-inflammatory medications are combined with antidepressants.

A well-balanced diet is crucial for maintaining proper bodily function, including emotional stability. Recent research has increasingly focused on the link between nutrients and depression. Let's examine this in detail: Fatty acids are vital for proper bodily function, including cognitive, social, and emotional processes. They are a fundamental component of the nervous system, brain, and all cells. The brain and central nervous system contain essential fatty acids (EFAs), including arachidonic acid (AA), docosahexaenoic acid (DHA), and eicosapentaenoic acid (EPA). A deficiency in DHA can lead to disruptions in neuronal membrane stability, dopamine and serotonin transmission, which in turn may cause mood swings, such as those seen in depression. EPA, on the other hand, regulates immune balance by reducing pro-inflammatory fatty acids. It also improves blood flow, facilitating the delivery of nutrients to the brain and preventing mood disorders. Due to its anti-inflammatory properties, EPA plays a significant role in depression treatment. A critical issue is the imbalance of fatty acids in the diet, which can exacerbate depressive symptoms, aggression, and impair cognitive functions. Currently, it is observed that the balance between omega-6 and omega-3 polyunsaturated fatty acids, as well as saturated and unsaturated fatty acids, is disrupted, contributing to the development of degenerative diseases. Scientific studies confirm that an adequate intake of omega-3 fatty acids (EPA, DHA) can alleviate depressive symptoms, improve cognitive processes, and regulate mood in individuals of all ages. Omega-3 fatty acids are also used in the treatment of treatment-resistant depression, such as in children, breastfeeding mothers, and pregnant women. The best sources of EPA and DHA are fatty marine fish (sardines, tuna, Atlantic salmon, mackerel, herring) and seafood. Additionally, fatty acids can be found in flaxseed oil, hemp oil, rapeseed oil, soybean oil, nuts, and leafy vegetables. Serotonin, also known as the "happiness hormone," is an important neurotransmitter in the central nervous system. It regulates mood, sleep, and appetite. Low serotonin levels can lead to overeating and depression. This hormone is produced in the body from L-tryptophan in the presence of folic acid, vitamin B12, and B6. Tryptophan is an exogenous amino acid that must be obtained through diet. It is primarily found in cheeses, eggs, meat, deli meats, fish, grain products, vegetables, fruits, almonds, and nuts. Studies indicate that women are more susceptible to mood swings due to tryptophan deficiency. Excess tryptophan is rare but can occur due to improper supplementation and may manifest as nausea, vomiting, headaches, blurred vision, drowsiness, dry mouth, and in extreme cases, nerve damage and bladder cancer.

Mental health is significantly influenced by adequate vitamin intake. For the prevention and treatment of depression, the following vitamins are particularly important: Vitamin D3, Vitamin B1, Vitamin B12, Vitamin B6, and Folic Acid. Vitamin D3 is synthesized in the skin through sunlight exposure, with fatty marine fish serving as its richest dietary source. Research indicates that a deficiency of this vitamin increases the risk of osteoporosis, cancer, autoimmune diseases, and psychiatric disorders. Furthermore, low levels of Vitamin D3 in the blood may contribute to the onset of depressive episodes or recurrences in individuals with a history of depression. B-complex vitamins play a crucial role in depression treatment. Vitamin B1 (Thiamine) is essential for proper nerve impulse transmission, and its deficiency can lead to reduced glucose supply to the brain and neurological disturbances. Vitamin B12 and folic acid are important as they participate in the synthesis of neurotransmitters, including serotonin, which affects mood. Vitamin B12 deficiency can result in memory disorders and dementia. Folic acid is necessary for neurotransmitter synthesis, and its deficiency can cause neurological damage. Homocysteine also plays a significant role in the pathogenesis of depression.