So, eating foods that contain "good" bacteria, organisms that are beneficial for gut health, Timothy Mainardi, MD , an allergist and immunologist based in New York, told Health.

Fermented foods and beverages—think kombucha and kimchi—are chock-full of "good" bacteria, also known as probiotics. You could also consider a probiotic supplement. However, research has found that some probiotic foods and supplements may be unsafe for people with weakened immune systems—including those with chronic health conditions or undergoing chemotherapy.

If you have concerns, check with a healthcare provider before taking probiotics. The body needs zinc to support the immune system, said Dr. Additionally, zinc helps with wound healing. The recommended amount of zinc is 13 milligrams for adult men and 9. Typically, you can get enough zinc from foods like:.

Still, it may help to consider taking a zinc supplement after talking to a healthcare provider, suggested Dr. A healthcare provider may test your blood to see if you aren't getting enough zinc from your diet.

Hydration is key to a healthy body and immune system. Water serves several essential functions in the body, including:. It's also important to drink plenty of fluids when you're ill. Water replenishes the fluid you're losing through your lungs every time you cough and from losses due to sweating.

Moderate alcohol consumption doesn't appear to positively affect your immune system. And some evidence suggests that binge drinking, or more than four drinks in two hours for women and five for men, impairs immunity. And while there does not seem to be any good data measuring white blood cell levels for smaller amounts of alcohol, it is assumed that even one or two drinks can blunt your immune system response.

As for heavy drinking, a study published in in Alcohol Research: Current Reviews found a link between alcohol use disorder and a possible susceptibility to pneumonia. So, if you're working hard to stay healthy, it's best to avoid or limit alcohol.

One study published in in the Journal of Sports and Health Science described the following benefits of moderate to vigorous exercise:. In contrast, research has found that people with sedentary lifestyles are more likely to get colds or other infectious illnesses. The Centers for Disease Control and Prevention CDC recommends minutes of moderate-intensity aerobic activity weekly.

Or, if you prefer vigorous exercise, the CDC recommends 75 minutes at that intensity. A to minute at-home workout , jump rope or jog-in-place session, or a brisk walk around the neighborhood several times a week are good ways to work some sweat into your schedule.

For example, in one study published in in Nature and Science of Sleep , researchers found disrupted sleep caused serious health ramifications, including:. Also, don't assume you can just catch up on sleep after a night or two of staying up late or tossing and turning.

Remember, your body is busy at rest, and it's designed to sleep when the sun goes down. According to the National Sleep Foundation, adults between 18—64 need seven to nine hours of sleep per night.

Also, older adults need seven to eight hours, and children and adolescents require even more sleep. Aim for the right amount for your age group, and be as consistent as possible. Turning in and waking up at roughly the same time every day is healthier than an all-over-the-place sleep schedule.

Unchecked stress, anxiety, worry, and panic pack have many negative health effects. And suppressing the immune system is one of them, said Dr. Prolonged stress also drives up levels of the hormones cortisol and adrenaline. Eventually, too much of those hormones can inflict damage on the body.

You can take small steps to help chill and unwind, including:. Excessive social media usage might increase your stress and anxiety. Still, screen time watching a movie you love or a binge session of your favorite TV show can help take your mind off things.

When it comes to keeping your immune system strong, proper handwashing is one of the most important things. But if you can't get to soap and water, hand sanitizer is the next best thing.

Plain old soap and water are all you need. It's important to scrub up for at least 20 seconds—the length of singing "Happy Birthday" twice. Per the CDC, that's the minimum time needed to significantly reduce the number of microorganisms on your skin.

But no matter how good your handwashing skills are, they won't help prevent infection unless you know when to scrub up. In other words, that includes after using the restroom, sneezing, or coughing. Also, wash your hands before you prepare food, after caring for a sick loved one, treating a wound, or touching any publicly used door handles, knobs, switches, or surfaces, added Dr.

And if your hands are prone to dry skin, the right moisturizer can help. If you don't have access to soap and water, hand sanitizer can help kill most microorganisms. Just be sure to take a peek at the alcohol percentage first. Alcohol is the active ingredient working to kill viruses and bacteria.

You may be unable to avoid viruses and bacteria that spread the common cold and flu entirely. But you can avoid them as best you can by strengthening your immune system. Focusing on nutrition, hygiene, and other health habits is the key to doing so. These simple immune-boosting habits can help you steer clear of some infections.

Others can supercharge your immune system, so you can get better quickly if you get sick. Dietary supplements are minimally regulated by the FDA and may or may not be suitable for you.

The effects of supplements vary from person to person and depend on many variables, including type, dosage, frequency of use, and interactions with current medications. Please speak with your healthcare provider or pharmacist before starting any supplements.

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Antiviral phytochemicals: an overview. Biochem Physiol. Calder PC. Omega-3 fatty acids and inflammatory processes: from molecules to man. Biochem Soc Trans. Stromsnes K, Correas AG, Lehmann J, Gambini J, Olaso-Gonzalez G. Anti-Inflammatory Properties of Diet: Role in Healthy Aging. Stadlbauer V.

Immunosuppression and probiotics: are they effective and safe? Benef Microbes. National Institutes of Health.

Office of Dietary Supplements. People with a strong immune system are more likely to recover quickly from an injury or illness, feel less fatigue and have good gut health. People at risk of having a weak immune system are often older or suffer from chronic conditions like heart disease, diabetes or cancer.

People with a weakened immune system are more likely to experience conditions like anemia, autoimmune disorders and higher frequency of infections. From the food you eat to your daily routine, many elements can positively impact your immune system. Explore ways to enhance your immune system naturally or with vitamins that contain immune system boosters.

Making some simple changes in behavior and forming new habits can help you to naturally boost your immune system, including:. Your diet can work wonders for your overall health, like giving your immune system a boost and even improving your mood. The best way to get the nutrients your body needs and boost immunity is through the foods you eat.

But if you have dietary restrictions for health, lifestyle, religion or other reasons, vitamins and supplements may be able to step in and fill any gaps where your diet falls short.