How Nutrition Affects Your Mental Health: The Best and Worst Foods for Your Mood

Have you ever wondered how what you eat affects your mental health? You may have heard the saying “you are what you eat”, but did you know that your diet can also influence your mood, emotions, and cognition?

In this blog post, we will explore the link between nutrition and mental health, and give you some tips on what to eat and avoid to support your well-being.

How are nutrition and mental health linked?

Nutrition and mental health are closely connected, as both depend on the proper functioning of your brain. Your brain is a complex organ that requires a constant supply of fuel, which comes from the food you eat. The quality and quantity of this fuel can affect the structure and function of your brain cells, as well as the production and balance of neurotransmitters, which are chemical messengers that regulate your mood, behavior, and cognition.

Some of the nutrients that are essential for your brain health include:

1. Omega-3 fatty acids: These are healthy fats that are found in oily fish, such as salmon, mackerel, and sardines, as well as in nuts, seeds, and plant oils. Omega-3 fatty acids help build and maintain the membranes of your brain cells, and also have anti-inflammatory and antioxidant properties that protect your brain from damage and aging. Omega-3 fatty acids have been shown to improve symptoms of depression, anxiety, bipolar disorder, and schizophrenia.
2. B vitamins: These are a group of vitamins that are involved in many metabolic processes in your body, including the synthesis of neurotransmitters, such as serotonin, dopamine, and norepinephrine. Serotonin is often called the “happiness hormone”, as it helps regulate your mood, sleep, and appetite. Dopamine and norepinephrine are responsible for motivation, reward, and attention. B vitamins are found in whole grains, legumes, eggs, dairy products, meat, and leafy green vegetables. B vitamins have been linked to lower levels of stress, depression, and cognitive decline.
3. Antioxidants: These are substances that help protect your cells from oxidative stress, which is caused by free radicals, or unstable molecules that can damage your DNA and cell membranes. Oxidative stress can impair your brain function and contribute to neurodegenerative diseases, such as Alzheimer’s and Parkinson’s. Antioxidants are found in fruits, vegetables, herbs, spices, tea, coffee, and dark chocolate. Antioxidants have been associated with improved memory, learning, and mood.

What should you eat to support your mental health?

Based on the evidence, the best diet for your mental health is one that is rich in whole, unprocessed foods, such as fruits, vegetables, whole grains, legumes, nuts, seeds, fish, eggs, and lean meats. This type of diet is often referred to as the Mediterranean diet, as it is inspired by the traditional eating patterns of people living in countries bordering the Mediterranean Sea. The Mediterranean diet has been proven to reduce the risk of depression, anxiety, and cognitive impairment, as well as chronic diseases, such as cardiovascular disease, diabetes, and cancer.

Some of the key features of the Mediterranean diet are:

1. Eating plenty of fruits and vegetables of different colors and varieties, as they provide a range of antioxidants, vitamins, minerals, and fiber that support your brain and gut health. Aim for at least five servings of fruits and vegetables per day, and include some berries, citrus fruits, cruciferous vegetables, and leafy greens, as they have the highest antioxidant content.
2. Choosing whole grains over refined grains, as they contain more fiber, B vitamins, and phytochemicals that help regulate your blood sugar, cholesterol, and inflammation levels. Examples of whole grains are oats, barley, quinoa, buckwheat, brown rice, and whole wheat. Avoid white bread, white rice, and pastries, as they can spike your blood sugar and cause mood swings.
3. Including legumes, such as beans, lentils, chickpeas, and soybeans, in your diet, as they are a great source of plant-based protein, fiber, iron, folate, and other nutrients that support your brain function and mood. Legumes can also help lower your blood pressure, cholesterol, and inflammation, which are risk factors for mental disorders. Try to eat at least three servings of legumes per week, and use them to make soups, salads, curries, or hummus.
4. Eating fish at least twice a week, especially oily fish, such as salmon, mackerel, and sardines, as they are rich in omega-3 fatty acids, which are essential for your brain health and mood. Fish also contains high-quality protein, iodine, selenium, and vitamin D, which are important for your thyroid function, immune system, and bone health. If you don’t eat fish, you can supplement with fish oil or algae oil, which are also good sources of omega-3 fatty acids.
5. Consuming moderate amounts of dairy products, such as milk, yogurt, cheese, and kefir, as they provide calcium, protein, and probiotics, which are beneficial bacteria that live in your gut and influence your mood and cognition. Dairy products can also help prevent osteoporosis, which is a condition that causes your bones to become weak and brittle. Choose low-fat or fat-free dairy products, and avoid flavored or sweetened varieties, as they can contain added sugar and artificial ingredients.
6. Eating nuts and seeds regularly, as they are packed with healthy fats, protein, fiber, magnesium, zinc, and other nutrients that support your brain function and mood. Nuts and seeds also help lower your blood pressure, cholesterol, and inflammation, and protect your brain from oxidative stress. Examples of nuts and seeds are almonds, walnuts, pistachios, cashews, sunflower seeds, pumpkin seeds, chia seeds, and flaxseeds. Eat a handful of nuts and seeds per day, and add them to your salads, oatmeal, yogurt, or smoothies.
7. Using olive oil as your main cooking oil, as it is rich in monounsaturated fats, which are good for your heart and brain health. Olive oil also contains antioxidants, such as polyphenols and vitamin E, which protect your cells from damage and aging. Olive oil has been shown to improve cognitive function, memory, and mood, and reduce the risk of depression and dementia. Use extra virgin olive oil, which is the least processed and has the highest antioxidant content, and drizzle it over your salads, vegetables, or bread.
8. Limiting your intake of red meat and processed meat, such as bacon, ham, sausages, and salami, as they are high in saturated fat, cholesterol, and sodium, which can increase your risk of heart disease, stroke, and diabetes. Red meat and processed meat also contain heme iron, which can promote oxidative stress and inflammation in your body. Some studies have linked high consumption of red meat and processed meat to increased risk of depression, anxiety, and cognitive decline. If you eat meat, choose lean cuts, such as chicken, turkey, or pork, and limit your portion to the size of your palm. Avoid frying or grilling your meat, as this can create harmful compounds, such as heterocyclic amines and polycyclic aromatic hydrocarbons, which can damage your DNA and increase your risk of cancer. Instead, bake, roast, or stew your meat, and use herbs, spices, and marinades to enhance the flavor.
9. Drinking moderate amounts of red wine, as it contains antioxidants, such as resveratrol, which can protect your brain from oxidative stress and inflammation. Red wine also has a relaxing effect, which can help reduce stress and anxiety. However, drinking too much alcohol can have negative effects on your mental health, such as impairing your judgment, memory, and sleep quality, and increasing your risk of addiction, depression, and suicide. The recommended limit for alcohol consumption is no more than one drink per day for women and two drinks per day for men. One drink is equivalent to 5 ounces of wine, 12 ounces of beer, or 1.5 ounces of liquor. If you don’t drink alcohol, you can get the same benefits from grape juice, which also contains resveratrol and other antioxidants.
10. Enjoying your food and eating mindfully, as this can enhance your satisfaction and pleasure, and prevent overeating and bingeing. Eating mindfully means paying attention to your hunger and fullness cues, eating slowly and without distractions, savoring the taste and texture of your food, and being aware of your emotions and thoughts while eating. Eating mindfully can help you cope with stress, improve your mood, and reduce your risk of eating disorders.

What should you avoid to support your mental health?

While eating a balanced and varied diet can improve your mental health, eating a poor and unhealthy diet can have the opposite effect. Some of the foods and drinks that you should avoid or limit to support your mental health are:

1. Sugar and refined carbohydrates, such as white bread, white rice, pasta, pastries, cakes, cookies, candy, soda, and fruit juice, as they can cause rapid spikes and crashes in your blood sugar, which can affect your mood, energy, and concentration. Sugar and refined carbohydrates can also increase your inflammation, oxidative stress, and insulin resistance, which can impair your brain function and increase your risk of depression, anxiety, and dementia. Try to limit your intake of sugar and refined carbohydrates to less than 10% of your total calories per day, and replace them with complex carbohydrates, such as whole grains, legumes, fruits, and vegetables, which provide more fiber, vitamins, minerals, and phytochemicals, and help stabilize your blood sugar and mood.
2. Trans fats and hydrogenated oils, such as margarine, shortening, and vegetable oils, as they can interfere with the structure and function of your brain cells, and disrupt the balance of your neurotransmitters. Trans fats and hydrogenated oils can also increase your inflammation, oxidative stress, and cholesterol levels, which can damage your blood vessels and reduce the blood flow to your brain. Trans fats and hydrogenated oils have been linked to increased risk of depression, anxiety, and cognitive decline. Avoid foods that contain trans fats and hydrogenated oils, such as fried foods, baked goods, snacks, and fast foods, and check the labels for ingredients like “partially hydrogenated oil” or “hydrogenated oil”. Instead, use healthy oils, such as olive oil, coconut oil, or avocado oil, which contain monounsaturated and saturated fats that are beneficial for your brain health and mood.
3. Artificial sweeteners, such as aspartame, sucralose, and saccharin, as they can alter your gut microbiome, which is the collection of bacteria, fungi, and viruses that live in your digestive tract and influence your mood and cognition. Artificial sweeteners can also affect your appetite, taste, and reward pathways, and increase your cravings for sweet and high-calorie foods. Artificial sweeteners have been associated with increased risk of depression, anxiety, and cognitive impairment. Avoid foods and drinks that contain artificial sweeteners, such as diet soda, sugar-free gum, candy, and yogurt, and check the labels for ingredients like “acesulfame potassium”, “aspartame”, “sucralose”, or “saccharin”. Instead, use natural sweeteners, such as honey, maple syrup, or stevia, which are less processed and have fewer negative effects on your brain and gut health. However, use them sparingly, as they still contain calories and can affect your blood sugar and mood.
4. Caffeine and alcohol, as they can have both positive and negative effects on your mental health, depending on the amount and frequency of consumption. Caffeine and alcohol can both stimulate your central nervous system, which can improve your alertness, mood, and performance, but can also cause anxiety, insomnia, irritability, and withdrawal symptoms. Caffeine and alcohol can also dehydrate your body and brain, which can impair your cognitive function and mood. Caffeine and alcohol can also interact with your medications, supplements, and other substances, and cause adverse reactions or reduce their effectiveness. The recommended limit for caffeine consumption is no more than 400 mg per day, which is equivalent to about four cups of coffee, and the recommended limit for alcohol consumption is no more than one drink per day for women and two drinks per day for men. One drink is equivalent to 5 ounces of wine, 12 ounces of beer, or 1.5 ounces of liquor. If you are sensitive to caffeine or alcohol, or have a history of mental disorders, addiction, or liver problems, you may want to avoid or limit them altogether, and consult your doctor before consuming them.

Conclusion

Nutrition and mental health are closely linked, as what you eat can affect your brain function and mood. Eating a balanced and varied diet, such as the Mediterranean diet, can improve your mental health, as it provides a range of nutrients, antioxidants, and probiotics that support your brain and gut health. Avoiding or limiting foods and drinks that can harm your mental health, such as sugar, refined carbohydrates, trans fats, artificial sweeteners, caffeine, and alcohol, can also prevent or reduce the symptoms of depression, anxiety, and cognitive decline. Eating mindfully and enjoying your food can also enhance your satisfaction and pleasure, and prevent overeating and bingeing. Remember, you are what you eat, so choose wisely and nourish your mind and body.

References

: Grosso G, Galvano F, Marventano S, et al. Omega-3 fatty acids and depression: scientific evidence and biological mechanisms. Oxid Med Cell Longev. 2014;2014:313570. doi:10.1155/2014/313570 : Bozzatello P, Brignolo E, De Grandi E, Bellino S. Supplementation with Omega-3 Fatty Acids in Psychiatric Disorders: A Review of Literature Data. J Clin Med. 2016;5(8):67. Published 2016 Jul 27. doi:10.3390/jcm5080067 : Kennedy DO. B Vitamins and the Brain: Mechanisms, Dose and Efficacy–A Review. Nutrients. 2016;8(2):68. Published 2016 Jan 27. doi:10.3390/nu8020068 : Knüppel A, Shipley MJ, Llewellyn CH, Brunner EJ. Sugar intake from sweet food and beverages, common mental disorder and depression: prospective findings from the Whitehall II study. Sci Rep. 2017;7(1):6287. Published 2017 Jul 27. doi:10.1038/s41598-017-05649-7 : Akbaraly TN, Brunner EJ, Ferrie JE, Marmot MG, Kivimaki M, Singh-Manoux A. Dietary pattern and depressive symptoms in middle age. Br J Psychiatry. 2009;195(5):408-413. doi:10.1192/bjp.bp.108.058925 : Sanchez-Villegas A, Verberne L, De Irala J, et al. Dietary fat intake and the risk of depression: the SUN Project. PLoS One. 2011;6(1):e16268. doi:10.1371/journal.pone.0016268 : Morris MC, Evans DA, Bienias JL, et al. Dietary fats and the risk of incident Alzheimer disease. Arch Neurol. 2003;60(2):194-200. doi:10.1001/archneur.60.2.194 : Lindseth GN, Coolahan SE, Petros TV, Lindseth PD. Neurobehavioral Effects of Aspartame Consumption. Res Nurs Health. 2014;37(3):185-193. doi:10.1002/nur.21595 : Suez J, Korem T, Zeevi D, et al. Artificial sweeteners induce glucose intolerance by altering the gut microbiota. Nature. 2014;514(7521):181-186. doi:10.1038/nature13793