27 Health and Nutrition Tips That Are Actually Evidence-Based
It’s easy to get confused when it comes to health and nutrition. Even qualified experts often seem to hold opposing opinions, which can make it difficult to figure out what you should actually be doing to optimize your health. Yet, despite all the disagreements, a number of wellness tips are well supported by research. Here are 27 health and nutrition tips that are based on scientific evidence. Guille Faingold/Stocksy United 1. Limit sugary drinks Sugary drinks like sodas, fruit juices, and sweetened teas are the primary source of added sugar in the American diet (1Trusted Source). Unfortunately, findings from several studies point to sugar-sweetened beverages increasing risk of heart disease and type 2 diabetes, even in people who are not carrying excess body fat (2Trusted Source). Sugar-sweetened beverages are also uniquely harmful for children, as they can contribute not only to obesity in children but also to conditions that usually do not develop until adulthood, like type 2 diabetes, high blood pressure, and non-alcoholic fatty liver disease (3Trusted Source, 4Trusted Source, 5Trusted Source). Healthier alternatives include: water unsweetened teas sparkling water coffee 2. Eat nuts and seeds Some people avoid nuts because they are high in fat. However, nuts and seeds are incredibly nutritious. They are packed with protein, fiber, and a variety of vitamins and minerals (6Trusted Source, 7Trusted Source). Nuts may help you lose weight and reduce the risk of developing type 2 diabetes and heart disease (8Trusted Source). Additionally, one large observational study noted that a low intake of nuts and seeds was potentially linked to an increased risk of death from heart disease, stroke, or type 2 diabetes (9Trusted Source). 3. Avoid ultra-processed foods Ultra-processed foods are foods containing ingredients that are significantly modified from their original form. They often contain additives like added sugar, highly refined oil, salt, preservatives, artificial sweeteners, colors, and flavors as well (10Trusted Source). Examples include: snack cakes fast food frozen meals canned foods chips Ultra-processed foods are highly palatable, meaning they are easily overeaten, and activate reward-related regions in the brain, which can lead to excess calorie consumption and weight gain. Studies show that diets high in ultra-processed food can contribute to obesity, type 2 diabetes, heart disease, and other chronic conditions (11Trusted Source, 12Trusted Source, 13Trusted Source, 14Trusted Source, 15Trusted Source). In addition to low quality ingredients like inflammatory fats, added sugar, and refined grains, they’re usually low in fiber, protein, and micronutrients. Thus, they provide mostly empty calories. 4. Don’t fear coffee Despite some controversy over it, coffee is loaded with health benefits. It’s rich in antioxidants, and some studies have linked coffee intake to longevity and a reduced risk of type 2 diabetes, Parkinson’s and Alzheimer’s diseases, and numerous other illnesses (16Trusted Source, 17Trusted Source, 18Trusted Source, 19Trusted Source). The most beneficial intake amount appears to be 3–4 cups per day, although pregnant people should limit or avoid it completely because it has been linked to low birth weight (18Trusted Source). However, it’s best to consume coffee and any caffeine-based items in moderation. Excessive caffeine intake may lead to health issues like insomnia and heart palpitations. To enjoy coffee in a safe and healthy way, keep your intake to less than 4 cups per day and avoid high-calorie, high-sugar additives like sweetened creamer. 5. Eat fatty fish Fish is a great source of high-quality protein and healthy fat. This is particularly true of fatty fish, such as salmon, which is loaded with anti-inflammatory omega-3 fatty acids and various other nutrients (20Trusted Source, 21Trusted Source). Studies show that people who eat fish regularly have a lower risk for several conditions, including heart disease, dementia, and inflammatory bowel disease (22Trusted Source, 23Trusted Source, 24Trusted Source). 6. Get enough sleep The importance of getting enough quality sleep cannot be overstated. Poor sleep can drive insulin resistance, can disrupt your appetite hormones, and reduce your physical and mental performance (25Trusted Source, 26Trusted Source, 27Trusted Source). What’s more, poor sleep is one of the strongest individual risk factors for weight gain and obesity. People who do not get enough sleep tend to make food choices that are higher in fat, sugar, and calories, potentially leading to unwanted weight gain (28Trusted Source, 29Trusted Source). 7. Feed your gut bacteria The bacteria in your gut, collectively called the gut microbiota, are incredibly important for overall health. A disruption in gut bacteria is linked to some chronic diseases, including obesity and a myriad of digestive problems (30Trusted Source, 31Trusted Source). Good ways to improve gut health include eating probiotic foods like yogurt and sauerkraut, taking probiotic supplements — when indicated — and eating plenty of fiber. Notably, fiber serves as a prebiotic, or a food source for your gut bacteria (32Trusted Source, 33Trusted Source). 8. Stay hydrated Hydration is an important and often overlooked marker of health. Staying hydrated helps ensure that your body is functioning optimally and that your blood volume is sufficient (34Trusted Source). Drinking water is the best way to stay hydrated, as it’s free of calories, sugar, and additives. Although there’s no set amount that everyone needs per day, aim to drink enough so that your thirst is adequately quenched (35Trusted Source). 9. Don’t eat heavily charred meats Meat can be a nutritious and healthy part of your diet. It’s very high in protein and a rich source of nutrients (36Trusted Source). However, problems occur when meat is charred or burnt. This charring can lead to the formation of harmful compounds that may increase your risk for certain cancers (37Trusted Source). When you cook meat, try not to char or burn it. Additionally limit your consumption of red and processed meats like lunch meats and bacon as these are linked to overall cancer risk and colon cancer risk (38Trusted Source, 39Trusted Source, 40Trusted Source, 41Trusted Source). 10. Avoid bright lights before sleep When you’re exposed to bright lights — which contain blue light wavelengths — in the evening, it may disrupt your production of the sleep hormone melatonin (42Trusted Source). Some ways to help reduce your blue light exposure is to wear blue light blocking glasses — especially if you use a computer or other digital screen for long periods of time — and to avoid digital screens for 30 minutes to an hour before going to bed (43Trusted Source). This can help your body better produce melatonin naturally as evening progresses, helping you sleep better. 11. Take vitamin D if you’re deficient Most people do not get enough vitamin D. While these widespread vitamin D inadequacies are not imminently harmful, maintaining adequate vitamin D levels can help to optimize your health by improving bone strength, reducing symptoms of depression, strengthening your immune system, and lowering your risk for cancer (44Trusted Source, 45Trusted Source, 46Trusted Source, 47Trusted Source). If you do not spend a lot of time in the sunlight, your vitamin D levels may be low. If you have access, it’s a great idea to have your levels tested, so that you can correct your levels through vitamin D supplementation if necessary. 12. Eat plenty of fruits and vegetables Vegetables and fruits are loaded with prebiotic fiber, vitamins, minerals, and antioxidants, many of which have potent health effects. Studies show that people who eat more vegetables and fruits tend to live longer and have a lower risk for heart disease, obesity, and other illnesses (48Trusted Source, 49Trusted Source). 13. Eat adequate protein Eating enough protein is vital for optimal health, as it provides the raw materials your body needs to create new cells and tissues (50Trusted Source). What’s more, this nutrient is particularly important for maintenance of a moderate body weight. High protein intake may boost your metabolic rate — or calorie burn — while making you feel full. It may also reduce cravings and your desire to snack late at night (51Trusted Source, 52Trusted Source). 14. Get moving Doing aerobic exercise, or cardio, is one of the best things you can do for your mental and physical health. It’s particularly effective at reducing belly fat, the harmful type of fat that builds up around your organs. Reduced belly fat may lead to major improvements in your metabolic health (53Trusted Source). According to the Physical Activity Guidelines for Americans, we should strive for at least 150 minutes of moderate intensity activity each week (54Trusted Source). 15. Don’t smoke or use drugs, and only drink in moderation Smoking, harmful use of drugs, and alcohol abuse can all seriously negatively affect your health. If you do any of these actions, consider cutting back or quitting to help reduce your risk for chronic diseases. There are resources available online — and likely in your local community, as well — to help with this. Talk with your doctor to learn more about accessing resources. 16. Use extra virgin olive oil Extra virgin olive oil is one of the healthiest vegetable oils you can use. It’s loaded with heart-healthy monounsaturated fats and powerful antioxidants that have anti-inflammatory properties (55Trusted Source, 56Trusted Source). Extra virgin olive oil may benefit heart health, as people who consume it have a lower risk for dying from heart attacks and strokes according to some evidence (57Trusted Source). 17. Minimize your sugar intake Added sugar is extremely prevalent in modern food and drinks. A high intake is linked to obesity, type 2 diabetes, and heart disease (1Trusted Source, 2Trusted Source, 58Trusted Source). The Dietary Guidelines for Americans recommend keeping added sugar intake below 10% of your daily calorie intake, while the World Health Organization recommends slashing added sugars to 5% or less of your daily calories for optimal health (59Trusted Source, 60Trusted Source). 18. Limit refined carbs Not all carbs are created equal. Refined carbs have been highly processed to remove their fiber. They’re relatively low in nutrients and may harm your health when eaten in excess. Most ultra-processed foods are made from refined carbs, like processed corn, white flour, and added sugars. Studies show that a diet high in refined carbs may be linked to overeating, weight gain, and chronic diseases like type 2 diabetes and heart disease (61Trusted Source, 62Trusted Source, 63Trusted Source, 64Trusted Source). 19. Lift heavy weights Strength and resistance training are some of the best forms of exercises you can do to strengthen your muscles and improve your body composition. It may also lead to important improvements in metabolic health, including improved insulin sensitivity — meaning your blood sugar levels are easier to manage — and increases in your metabolic rate, or how many calories you burn at rest (65Trusted Source, 66Trusted Source). If you do not have weights, you can use your own bodyweight or resistance bands to create resistance and get a comparable workout with many of the same benefits. The Physical Activity Guidelines for Americans recommends resistance training twice per week (67Trusted Source). 20. Avoid artificial trans fats Artificial trans fats are harmful, man-made fats that are strongly linked to inflammation and heart disease (68Trusted Source). Avoiding them should be much easier now that they have been completely banned in the United States and many other countries. Note that you may still encounter some foods that contain small amounts of naturally occurring trans fats, but these are not associated with the same negative effects as artificial trans fats (69Trusted Source). 21. Use plenty of herbs and spices There is a variety of herbs and spices at our disposal these days, more so than ever. They not only provide flavor but also may offer several health benefits as well (70Trusted Source). For example, ginger and turmeric both have potent anti-inflammatory and antioxidant effects, which may help improve your overall health (71Trusted Source, 72Trusted Source). Due to their powerful potential health benefits, you should aim to include a wide variety of herbs and spices in your diet. 22. Nurture your social relationships Social relationships — with friends, family, and loved ones you care about — are important not only for your mental well-being but also your physical health. Studies show that people who have close friends and family are healthier and live much longer than those who do not (73Trusted Source, 74Trusted Source). 23. Occasionally track your food intake The only way to know exactly how many calories you eat is to weigh your food and use a nutrition tracker, as estimating your portion sizes and calorie intake is not unreliable (75Trusted Source, 76Trusted Source). Tracking can also provide insights into your protein, fiber, and micronutrient intake. Though some studies have found a link between tracking calories and disordered eating tendencies, there is some evidence that suggests that people who track their food intake tend to be more successful at losing weight and maintaining their weight loss (74Trusted Source, 77Trusted Source, 78Trusted Source, 79Trusted Source). 24. Get rid of excess belly fat Excessive abdominal fat, or visceral fat, is a uniquely harmful type of fat distribution that is linked to an increased risk of cardiometabolic diseases like type 2 diabetes and heart disease (80Trusted Source). For this reason, your waist size and waist-to-hip ratio may be much stronger markers of health than your weight. Cutting refined carbs, eating more protein and fiber, and reducing stress (which can reduce cortisol, a stress hormone that triggers abdominal fat deposition) are all strategies that may help you get rid of belly fat (81Trusted Source, 82Trusted Source, 83Trusted Source, 84Trusted Source). 25. Avoid restrictive diets Diets are generally ineffective and rarely work well long term. In fact, past dieting is one of the strongest predictors for future weight gain (85Trusted Source). This is because overly restrictive diets actually lower your metabolic rate, or the amount of calories you burn, making it more difficult to lose weight. At the same time, they also cause alterations to your hunger and satiety hormones, which make you hungrier and may cause strong food cravings for foods high in fat, calories, and sugar (86Trusted Source, 87Trusted Source). All of this is a recipe for rebound weight gain, or “yoyo” dieting. Instead of dieting, try adopting a healthier lifestyle. Focus on nourishing your body instead of depriving it. Weight loss should follow as you transition to whole, nutritious foods — which are naturally more filling while containing fewer calories than processed foods (14Trusted Source). 26. Eat whole eggs Despite the constant back and forth about eggs and health, it’s a myth that eggs are bad for you because of their cholesterol content. Studies show that they have minimal effect on blood cholesterol in the majority of people, and they’re a great source of protein and nutrients (87Trusted Source, 88Trusted Source). Additionally, a review involving 263,938 people found that egg intake had no association with heart disease risk (88Trusted Source). 27. Meditate Stress has a negative effect on your health. It can affect your blood sugar levels, food choices, susceptibility to sickness, weight, fat distribution, and more. For this reason, it’s important to find healthy ways to manage your stress. Meditation is one such way, and it has some scientific evidence to support its use for stress management and improving health (89Trusted Source, 90Trusted Source). In one study involving 48 people with high blood pressure, type 2 diabetes, or both, researchers found that meditation helped lower LDL (bad) cholesterol and inflammation compared with the control group. Additionally, the participants in the meditation group reported improved mental and physical wellness (91Trusted Source). The bottom line A few simple steps can go a long way toward improving your eating patterns and wellness. Still, if you’re trying to live a healthier life, do not just focus on the foods you eat. Exercise, sleep, and social relationships are also important. With the evidence-based tips above, it’s easy to introduce small changes that can have a big impact on your overall health. Just one thing Try this today: There are lots of suggestions on this list that can help you improve your health, but it’s best to put just one or two into practice at a time so you do not get burned out. As more of these healthy actions become habits, you can add more into your routine. Last medically reviewed on July 2, 2021 Written by Kris Gunnars, BSc — Medically reviewed by Jillian Kubala, MS, RD, Nutrition — Updated on March 10, 2022 NUTRITION 5 Simple Rules for Amazing Health Following a healthy lifestyle often seems incredibly complicated. Advertisements and experts all around you seem to give conflicting advice. However, leading a healthy life doesn’t need to be complicated. To gain optimal health, lose weight and feel better every day, all you need to do is follow these 5 simple rules. 1. Do Not Put Toxic Things Into Your Body Many things people put in their bodies are downright toxic. Some, such as cigarettes, alcohol and abusive drugs, are also highly addictive, making it hard for people to give them up or avoid them. If you have a problem with one of these substances, then diet and exercise are the least of your worries. While alcohol is fine in moderation for those who can tolerate it, tobacco and abusive drugs are bad for everyone. But an even more common problem today is eating unhealthy, disease-promoting junk foods. If you want to gain optimal health, you need to minimize your consumption of these foods. Probably the single most effective change you can make to improve your diet is to cut back on processed, packaged foods. This can be tough because many of these foods are designed to be extremely tasty and very hard to resist (1Trusted Source). When it comes to specific ingredients, added sugars are among the worst. These include sucrose and high-fructose corn syrup. Both can wreak havoc on your metabolism when consumed in excess, though some people can tolerate moderate amounts (2Trusted Source). In addition, it’s a good idea to avoid all trans fats, which are found in some types of margarine and packaged baked foods. SUMMARY You can’t be healthy if you keep putting disease-promoting substances into your body. These include tobacco and alcohol, but also certain processed foods and ingredients. 2. Lift Things and Move Around Using your muscles is extremely important for optimal health. While lifting weights and exercising can certainly help you look better, improving your appearance is really just the tip of the iceberg. You also need to exercise to ensure your body, brain and hormones function optimally. Lifting weights lowers your blood sugar and insulin levels, improves cholesterol and lowers triglycerides (3). It also raises your levels of testosterone and growth hormones, both associated with improved well-being (4Trusted Source). What’s more, exercise can help reduce depression and your risk of various chronic diseases, such as obesity, type 2 diabetes, heart disease, Alzheimer’s and many more (5Trusted Source). Additionally, exercise may help you lose fat, especially in combination with a healthy diet. It doesn’t just burn calories, but also improves your hormone levels and overall body function. Fortunately, there are many ways to exercise. You don’t need to go to a gym or own expensive workout equipment. It’s possible to exercise for free and in the comfort of your own home. Just do a search on Google or YouTube for “bodyweight workouts” or “calisthenics,” for example. Going outside to hike or take a walk is another important thing you should do, especially if you can get some sun while you’re at it (for a natural source of vitamin D). Walking is a good choice and a highly underrated form of exercise. The key is to choose something that you enjoy and can stick with in the long run. If you’re completely out of shape or have medical problems, it’s a good idea to talk to your doctor or a qualified health professional before starting a new training program. SUMMARY Exercise doesn’t just help you look better, it also improves your hormone levels, makes you feel better and reduces your risk of various diseases. 3. Sleep Like a Baby Sleep is very important for overall health and studies show that sleep deprivation correlates with many diseases, including obesity and heart disease (6Trusted Source, 7, 8Trusted Source). It’s highly recommended to make time for good, quality sleep. If you can’t seem to sleep properly, there are several ways you can try to improve it: Don’t drink coffee late in the day. Try to go to bed and wake up at similar times each day. Sleep in complete darkness, with no artificial lighting. Dim the lights in your home a few hours before bedtime. For more tips on how to improve your sleep, check out this article. It may also be a good idea to see your doctor. Sleep disorders, such as sleep apnea, are very common and in many cases easily treatable. SUMMARY Getting quality sleep can improve your health in more ways than you can imagine. You’ll feel better both physically and mentally and lower your risk of various health problems down the line. 4. Avoid Excess Stress A healthy lifestyle involves a wholesome diet, quality sleep and regular exercise. But the way you feel and how you think is also very important. Being stressed all the time is a recipe for disaster. Excess stress can raise cortisol levels and severely impair your metabolism. It can increase junk food cravings, fat in your stomach area and raise your risk of various diseases (9Trusted Source, 10Trusted Source, 11Trusted Source). Studies also show that stress is a significant contributor to depression, which is a massive health problem today (12, 13Trusted Source). To reduce stress, try to simplify your life — exercise, take nature walks, practice deep-breathing techniques and maybe even meditation. If you absolutely cannot handle the burdens of your daily life without becoming overly stressed, consider seeing a psychologist. Not only will overcoming your stress make you healthier, it will also improve your life in other ways. Going through life worried, anxious and never being able to relax and enjoy yourself is a big waste. SUMMARY Stress can wreak havoc on your health, leading to weight gain and various diseases. There are many ways you can reduce your stress. 5. Nourish Your Body With Real Foods The simplest and most effective way to eat healthy is to focus on real foods. Choose unprocessed, whole foods that resemble what they looked like in nature. It’s best to eat a combination of animals and plants — meat, fish, eggs, vegetables, fruits, nuts, seeds, as well as healthy fats, oils and high-fat dairy products. If you’re healthy, lean and active, eating whole, unrefined carbs is absolutely fine. These include potatoes, sweet potatoes, legumes and whole grains such as oats. However, if you’re overweight, obese or have shown signs of metabolic issues such as diabetes or metabolic syndrome, then cutting back on major carbohydrate sources can lead to dramatic improvements (14Trusted Source, 15Trusted Source, 16Trusted Source). People can often lose a lot of weight simply by cutting back on carbohydrates because they subconsciously start eating less (17Trusted Source, 18Trusted Source). Whatever you do, make an effort to choose whole, unprocessed foods instead of foods that look like they were made in a factory. SUMMARY Choosing whole, unprocessed foods such as fruits, vegetables, seeds and whole grains is very important for your health. You Need to Stick With It for Life It’s important to keep in mind that a dieting mindset is a bad idea because it almost never works in the long term. For this reason, it’s critical to aim for a lifestyle change. Being healthy is a marathon, not a sprint. It takes time and you need to stick with it for life.