A little knowledge goes a long way in helping to support your immune system. Here are answers to some common questions about immunity.
Our immune system is our mode of defense against intruders from the outside world. The immune system is able to differentiate between the body’s own cells and foreign antigens. This includes viruses, bacteria, fungi, foreign tissue, and toxins.
White blood cells recognize antigens and try to eliminate them. As we interact with our environment, the immune system becomes better and better at recognizing these antigens and keeping us healthy.
The immune system has two parts:
- The innate immune system. Also called the non-specific immune system, this uses cells called natural killer cells and phagocytes to fight off antigens that enter the body.
- The adaptive, or specific, immune system. This makes special proteins called antibodies, which are able to attack intruders that they recognize. Once you have antibodies against a particular virus or bacteria, that particular virus can’t make you sick again. This immunity may last for years, and in some cases, will last for life.
A balanced diet in general is important for your immune system. A few specific foods can help ensure you’re getting the right amount of vitamins, minerals, antioxidants, proteins, and healthy fats to keep inflammation low and support your immune system.
- colorful fruits and vegetables, which are high in antioxidants, vitamins, and minerals
- healthy fats, like those found in olive oil, avocado, and salmon
- fermented foods, such as yogurt, sauerkraut, kimchi, and kefir
- foods high in fiber, including whole grains and legumes
- herbs and spices, such as turmeric, black pepper, garlic, and ginger
- nuts and seeds, especially walnuts and flax seed
- dark chocolate
- green tea
Certain foods may increase inflammation in your body.
Try to avoid the following foods, which can increase inflammation:
- foods with added sugars, junk food, and fast food
- artificial trans fats, which are often added to processed and fried foods
- refined carbohydrates, which are found in white bread, pasta, pastries, cookies, and cakes
- processed meat
It’s also a good idea to limit your alcohol consumption.
Certain supplements may help support your immune system. However, as their name suggests, they should supplement — not replace — your healthy lifestyle.
Some people, particularly older adults, may be deficient in nutrients, such as vitamin C, vitamin D, and zinc, and may benefit from supplements.
For instance, your body doesn’t produce or store vitamin C, so if you don’t get the recommended daily amount from your diet (
Adults need roughly 7 to 9 hours of sleep per night. This varies from person to person. However, getting less than 7 hours of sleep per night on a regular basis may weaken your immune system.
Sleep deprivation keeps the immune system from building up protective, substances like antibodies and cytokines.
Yes. The Centers for Disease Control and Prevention (CDC)
The flu vaccine needs to be updated every year to keep up with different strains of the flu virus. So, it’s important to get the new vaccine each year.
You should consider making the flu shot a priority if you’re in any of the following categories:
- age 65 and older
- live in a nursing home or assisted care facility
- have a chronic health condition, such as diabetes, kidney or heart disease, cancer, or asthma
- have a weakened immune system
- work in healthcare
- are pregnant (check with your doctor first)
In those with obesity, losing weight could make a big difference in the overall immune system.
Lowering your overall calorie intake, getting some exercise, and increasing the amounts of fruits and vegetables in your diet are the first steps if you believe you need to lose weight. Talk to your doctor if you’re unsure where to begin.
Yes, moderate exercise is an excellent way to support your immune system. Try to aim for
Yes. Smoking can negatively
Reducing stress can make a big difference in your immune system functioning.
A few ways to reduce stress include:
- nature hikes
- listening to music
Other things you can do to stay healthy:
- Wash your hands with soap and water for at least 20 seconds frequently throughout the day, but especially before eating and after using the bathroom.
- Avoid touching your face.
- Avoid large crowds.
There are many ways to keep your immune system healthy, including eating well, exercising, and getting enough sleep. But there’s no quick fix.