Serotonin's Comprehensive Impact on Human Health
A deep dive into how Serotonin impacts our mental and physical health, mood, and the best foods to increase Serotonin production in the body.
Summary
The types of foods that enhance serotonin production in the body are foods rich in Omega-3 fatty acids (fatty fish (salmon, trout, mackerel), walnuts, flax seeds, chia seeds, soybeans, and sardines), tofu and soy foods, nuts and seeds (walnuts, peanuts, sunflower seeds, almonds, flax seeds, sesame seeds, and pumpkin seeds), fermented foods (yogurt, kefir, kimchi, pickles, and sauerkraut), complex carbohydrates (whole grains, fiber-rich fruits, beans, sweet potatoes, legumes, and vegetables), dairy products (2% milk, whole milk, cheese (cheddar and mozzarella), and yogurt), eggs, and dark green, leafy vegetables like spinach and mustard greens. Increased intake of serotonin-enhancing foods leads to the following physiological changes: enhanced gut health, improved sleep regulation, modulated stress response, regulated appetite, and reduced inflammation.
Complete Findings
Note: Tryptophan is an amino-acid that is crucial for serotonin production in the body. The body cannot produce tryptophan, so it must be obtained from the diet. While tryptophan can be found in food, serotonin cannot and can only be produced by nerve cells from tryptophan. Since the neurotransmitter is made from tryptophan, it is important to eat foods that are rich in this amino acid. Consuming foods high in tryptophan, vitamin B12, vitamin B6, and folate (folic acid) enhances the production of serotonin.
List Of The Types Of Foods That Enhance Serotonin Production In The Body
1. Foods Rich in Omega-3 Fatty Acids
Examples are "fatty fish (salmon, trout, mackerel), walnuts, flax seeds, chia seeds, soybeans, and sardines.
Omega-3 has an anti-inflammatory impact on the brain and enhances the production of serotonin.
Omega-3 is essential for "the proper function of the brain, cardiovascular system, and growth development system."
It also "lowers blood pressure, reduces triglycerides in the blood, helps reduce joint inflammation in rheumatoid disease, helps nourish brain and eyes functions, helps prevent and alleviate dementia, depression, asthma, migraine, and diabetes, and helps reduce the risk and preventing heart disease and ischemic stroke."
The presence of Omega-3 also increases the availability of serotonin release from brain membranes, improving overall relaxation and mood. They help modulate the hypothalamic-pituitary-adrenal (HPA) axis, which guides the body's response to stress, creating a more balanced stress response and decreasing aggressive behavior.
Salmon
Salmon is an oily fish that is rich in tryptophan.
It is also an excellent source of omega-3 fatty acids, which "support strong bones, eye health, brain function, and healthy skin."
It also provides a lot of vitamin D which is linked to bone health, as well as maintaining strong muscles and strong teeth.
2. Tofu and Soy Foods
For vegetarians and vegans, tofu and other soy products like soy milk, soy sauce, and edamame are rich in tryptophan and excellent sources of protein.
Tofu is also a source of calcium and helps maintain healthy teeth and bones.
Tofu is also high in unsaturated and saturated fats, which makes it a heart-healthy food choice.
3. Nuts and Seeds
Examples are walnuts, peanuts, sunflower seeds, almonds, flax seeds, sesame seeds, hazelnuts, pistachios, cashew nuts, and pumpkin seeds.
While nuts do not include as much tryptophan as eggs, poultry, or oily fish, they are a good source if one is a vegan or vegetarian. They are good sources of vitamins, antioxidants, fibers, healthy fats, and magnesium, which support overall brain health and the synthesis of serotonin.
Seeds like pumpkin and sunflower seeds are efficient sources of magnesium, which is a mineral that is associated with the production of serotonin.
4. Fermented Foods
Examples are yogurt, kefir, kimchi, pickles, and sauerkraut.
Lactobacillus, commonly found in yogurt and fermented foods, is linked to the potential prevention of depression and anxiety, and helps in stress management.
Lactobacillus' role in improving mental health is linked to its impact on the gut-brain axis. When plenty in the gut, Lactobacillus modulates the communication between the brain and the central nervous system, affecting the production of neurotransmitters like gamma-aminobutyric acid (GABA) and serotonin, which play major roles in mood regulation.
Lactobacillus also lowers inflammation in the gut, which directly leads to improved mental health.
Fermented foods improve the gut microbiome, creating a healthy mix of microbes while strengthening the intestine walls to prevent them from leaking.
Metabolites and microbes from fermented foods interact with receptors, influencing immune responses. They also affect the "hypothalami-pituitary-adrenal (HPA) axis and serotonin levels." Human and preclinical studies show that there are immense immunomodulatory impacts of fermented foods.
Since around 95% of the body's serotonin is produced in the gut with the help of gut bacteria, eating foods that are rich in probiotics helps support the production of good bacteria, which can positively influence serotonin production.
5. Complex Carbohydrates
Examples are foods that are sources of complex carbohydrates are whole grains, fiber-rich fruits, beans, sweet potatoes, legumes, and vegetables. These foods help in the production of serotonin by assisting with tryptophan absorption.
Complex carbohydrates are digested more slowly than simple carbohydrates, releasing glucose into the bloodstream more gradually, which regulates blood sugar levels and promotes gut health.
They also make it easier to maintain a healthy weight and prevent type II diabetes and cardiovascular problems.
6. Dairy Products And Eggs
Dairy Products
Examples are 2% milk, whole milk, cheese (cheddar and mozzarella), and yogurt.
Milk and cheese are rich in tryptophan and protein.
Dairy products are rich in vitamin D, which helps the brain produce mood-boosting chemicals. They are high in tryptophan.
They are also a great source of calcium, which supports healthy bones.
Eggs
Eggs contain high-quality protein, with all essential amino acids like tryptophan. The amount of protein in eggs can considerably increase tryptophan levels in the blood plasma, enhancing serotonin production in the body.
They are also a proper source of vitamins B12 and B6, which are crucial for serotonin production and brain functions.
Egg yolks contain tyrosine, choline, biotin, omega-3 fatty acids, and other nutrients that have many health benefits such as helping with depression and stressful situations by tyrosine.
Choline helps to maintain the structural integrity of cell membranes, cell signaling, fat transport and metabolism, and nerve impulse transmission. On the other hand, biotin's possible health benefits include diabetes management, healthy hair, nails, and skin, and nerve health.
They also have antioxidant properties.
7. Dark Green, Leafy Vegetables
Examples are spinach and mustard greens.
Dark green, leafy vegetables are a source of tryptophan.
Dark green, leafy vegetables are a great source of iron, which assists with the production of red blood cells and reduces the risk of developing iron deficiency, which can lead to breathing difficulties and low energy.
They are also rich in minerals and vitamins, which help improve bone health, control blood glucose, support heart health, and maintain eye health.
How Increased Serotonin Levels Due To Intake Of These Foods Could Influence Overall Well-Being And Mood
How Serotonin Impacts Human Health (Mental and Physical Health)
Serotonin is a mood stabilizer, helping the body to "regulate anxiety, experience happiness, heal wounds, and stimulate nausea." It is one of the natural chemicals in the body that control the mood, helping control when one sleeps and wakes up.
Serotonin in the brain regulates feelings including anxiety and happiness, and selective serotonin reuptake inhibitor (SSRI) medications relieve mood disorders by increasing brain serotonin activity. In the brain, serotonin affects anxiety, mood, and happiness by increasing electrical impulses and nerve stimulation.
In the stomach and intestines, serotonin helps initiate nausea and vomiting as a response to foods, illness, and other conditions. It also helps push out food from the digestive system when one has diarrhea.
Serotonin helps the blood to clot and wounds to heal, and is also involved in inflammation. "When excess serotonin is released from the enterochromaffin cell, it frequently is introduced to the bloodstream, where it interacts with blood platelets."
The serotonin is stored until a clot forms and is then re-released in the blood to control blood clotting and homeostasis.
Several research studies have linked serotonin to bone density. Humans with increased blood serotonin levels are linked to regular bone density.
How Serotonin Impacts The Way We Eat And Our Appetite
Brainstem-derived serotonin influences cognitive functions such as eating behaviors and regulated homeostatic functions of appetite and energy expenditure. On the other hand, gut-derived serotonin impacts feeding activity.
Serotonin helps regulate appetite by acting as a natural appetite suppressant for many people.
If the brain gets enough serotonin naturally, it will not demand that one eat excessively to get more serotonin. However, if there isn't enough serotonin in the brain, the brain looks for the chemical elsewhere, such as through eating food.
The central serotonin system regulates the ingestion of salt and food, acting as a regulator of ingestion (appetite and sodium appetite). Centrally, serotonin reduces appetite through the 5-HT1B and 5-HT2C receptors while one is eating.
Since most of the body's serotonin is in the gastrointestinal tract, it regulates bowel movements and functions. The enterochromaffin cells sense food in the stomach and in response, release serotonin and their increased levels in the gut lead to an increase in the speed of the digestive process, mostly due to the digestion of noxious substances and toxins.
The Specific Physiological Changes That Occur In The Body With Increased Intake Of Serotonin-Enhancing Foods
Note: For this research, a physiological change was defined as a "change in the normal function of a living organism." A similar description is, "physiological changes refer to the alterations that occur in a living organism over time. These changes can be observed at various levels, including cardiovascular, digestive, pulmonary, hematological, and endocrine systems."
Increased serotonin synthesis: Increased intake of foods that are rich in tryptophan increases its availability in the bloodstream and once it crosses the blood-brain barrier, it is converted to serotonin.
Enhanced gut health: A significant portion of the body's serotonin is produced in the gut and increased consumption of foods supporting a healthy gut microbiome, such as fermented foods and those high in fiber, promote serotonin production in the gastrointestinal tract.
Improved sleep regulation: Serotonin is a precursor to melatonin, the hormone that regulates sleep-wake cycles. Increased serotonin from dietary sources leads to higher melatonin production. In a study, students consuming tryptophan-rich foods had better sleep.
Modulated stress response: Serotonin influences the hypothalamic-pituitary-adrenal (HPA) axis, which regulates the body's response to stress.
Regulated appetite: Serotonin plays a crucial role in controlling appetite and satiety. Increased serotonin levels help regulate hunger signals and promote feelings of fullness. Enhanced serotonergic activity enhances satiety through the increase in the rate of satiation and lengthening the state of satiety.
Reduced inflammation: Some serotonin-enhancing foods, particularly those rich in omega-3 fatty acids like salmon, have anti-inflammatory properties.