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Make Your Immune System Bulletproof NowImmune system protection supplements -
Eating a variety of nutritious foods can give you enough vitamins, minerals, and other nutrients for a healthy immune system. This fact sheet describes what we know about the effectiveness and safety of common vitamins, minerals, and other dietary supplement ingredients that might affect immune function.
The health professional version of this fact sheet includes more details and references to the scientific literature. Getting enough vitamins and minerals through the foods and beverages you consume is important for a healthy immune system. If your health care provider determines that you are not getting enough of a specific nutrient, vitamin and mineral supplements can help increase intakes to recommended amounts.
Vitamin A is an essential nutrient found in many foods. It exists in two different forms:. Vitamin A is important for healthy immune function as well as vision, reproduction, growth, and development.
Vitamin A deficiency is rare in the United States, but it is common in many low- and middle-income countries. The recommended daily amount known as Recommended Dietary Allowance or RDA ranges from to 1, microgram mcg retinol activity equivalents RAE for infants , children, and teens, depending on age, and from to 1, mcg RAE for adults.
Children with a vitamin A deficiency are more likely to get diarrhea caused by germs. These children also have a higher chance of dying of diarrhea, especially in sub-Saharan Africa and south Asia. Research suggests that vitamin A supplements lower the risk and severity of diarrhea in children in low- and middle-income countries.
However, vitamin A supplementation might not help very young infants in these countries. HIV can also increase the risk of related health problems, such as diarrhea and respiratory diseases. Some studies in young children with HIV have found that vitamin A supplements help lower the risk of death.
Other studies in adults with HIV have found that vitamin A supplements do not improve immune function. Research in pregnant people with HIV has found that vitamin A supplements do not help reduce the chance of passing HIV from mother to infant.
However, one study found that pregnant people with HIV who took vitamin A were more likely to carry their babies to full-term. In low- and middle-income countries where vitamin A deficiency is common, children with measles are more likely to have severe symptoms and may die from the disease.
Preformed vitamin A is safe at daily intakes up to to 2, mcg for infants, children, and teens, depending on age, and up to 3, mcg for adults. There are no upper limits for beta-carotene and other forms of provitamin A.
Getting too much preformed vitamin A can cause severe headache, blurred vision, nausea , dizziness, muscle aches, and problems with coordination. In severe cases, getting too much preformed vitamin A can even lead to coma and death.
If you are pregnant, taking too much preformed vitamin A can cause birth defects, including abnormal eyes, skull, lungs , and heart. If you are or might be pregnant or breastfeeding, you should not take high-dose supplements of preformed vitamin A.
High intakes of beta-carotene provitamin A do not cause the same problems as preformed vitamin A. Consuming high amounts of beta-carotene can turn the skin yellow-orange, but this condition is harmless and goes away when you eat less of it.
However, several studies have shown that smokers, former smokers, and people exposed to asbestos who take high-dose beta-carotene supplements have a higher risk of lung cancer and death. Vitamin A supplements might interact with some medications such as orlistat used for weight loss , acitretin used to treat psoriasis , and bexarotene used to treat the skin effects of T-cell lymphoma.
More information about vitamin A is available in the ODS consumer fact sheet on vitamin A. Vitamin C is an essential nutrient found in citrus fruits and many other fruits and vegetables.
Vitamin C is an antioxidant and is important for healthy immune function. The body also needs vitamin C to make collagen. The RDA ranges from 15 to milligrams mg for infants, children, and teens, depending on age, and from 75 to mg for nonsmoking adults.
People who smoke need 35 mg more than the RDA per day. Taking vitamin C regularly might help decrease cold symptoms and reduce the number of days a cold lasts.
It might also help reduce the risk of getting a cold in people who undergo extreme physical stress, such as marathon runners and soldiers stationed in very cold locations.
However, taking vitamin C after coming down with a cold may not be helpful. Research suggests that vitamin C supplements might be more effective in people who do not get enough vitamin C from foods and beverages.
In some studies, IV vitamin C reduced the risk of death, but in other studies it did not affect the risk of death or the amount of organ damage. Other research suggests that IV vitamin C might increase the risk of death or organ damage.
Vitamin C is safe at daily intakes up to to 1, mg for children and teens, depending on age, and up to 2, mg for adults. Taking higher amounts of vitamin C can cause diarrhea, nausea, and stomach cramps, and it might also cause false readings on blood sugar monitors, which are used by people with diabetes.
In people with hemochromatosis an iron overload disorder , high amounts of vitamin C might cause iron build-up in the body, which can damage body tissues.
Vitamin C supplements might decrease the effectiveness of radiation therapy and chemotherapy. More information about vitamin C is available in the ODS consumer fact sheet on vitamin C.
For information about vitamin C and COVID, see the ODS consumer fact sheet, Dietary Supplements in the Time of COVID Vitamin D is an essential nutrient that is naturally present in fatty fish and fish liver oils and in small amounts in beef liver, egg yolks, and cheese.
Your body can also make vitamin D when your skin is exposed to the sun. Vitamin D is important for healthy bones and immune function. The RDA ranges from 10 to 15 mcg International Units [ IU ] to IU for infants, children, and teens, depending on age, and from 15 to 20 mcg to IU for adults.
People with low vitamin D levels might be more likely to get respiratory infections and might have a higher chance of dying from these infections. Some studies suggest that taking vitamin D supplements regularly might slightly reduce the risk of getting a respiratory infection, especially in people with low vitamin D levels.
However, other studies have not found that taking vitamin D supplements reduces the risk of respiratory infections. In addition, vitamin D supplements do not appear to help treat respiratory infections. People with HIV have a higher risk of vitamin D deficiency partly because many HIV medications cause the body to break down vitamin D faster than normal.
Having a vitamin D deficiency might also worsen HIV infection. Vitamin D is safe at daily intakes up to 25 to mcg 1, to 4, IU for infants, children, and teens, depending on age, and up to mcg 4, IU for adults. Taking higher amounts can cause nausea, vomiting, muscle weakness, confusion, pain, loss of appetite, dehydration, excessive urination and thirst, and kidney stones.
Extremely high doses can cause kidney failure , damaged blood vessels and heart valves, heart rhythm problems, and death. Vitamin D supplements might interact with some medications such as orlistat used for weight loss , statins used to lower cholesterol levels , thiazide diuretics used for high blood pressure , and steroids.
More information about vitamin D is available in the ODS consumer fact sheet on vitamin D. For information about vitamin D and COVID, see the ODS consumer fact sheet, Dietary Supplements in the Time of COVID Vitamin E also called alpha-tocopherol is an essential nutrient found in nuts, seeds, vegetable oils, and green leafy vegetables.
It acts as an antioxidant and helps your immune system function properly. Vitamin E deficiency is rare. The RDA is 4 to 15 mg for infants, children, and teens, depending on age, and 15 to 19 mg for adults.
Some studies have found that vitamin E supplements might help but others have not, and the effects might depend on whether someone has low vitamin E levels. One study in people who had normal vitamin E levels found that those who took high-dose vitamin E supplements had worse respiratory symptoms and were sick longer.
Vitamin E from food is safe at any level. In supplements, vitamin E is safe at daily intakes up to to mg for children and teens, depending on age, and up to 1, mg for adults. Taking higher amounts can increase the risk of bleeding and stroke.
Vitamin E supplements might interact with blood thinners and might reduce the effectiveness of radiation therapy and chemotherapy.
More information about vitamin E is available in the ODS consumer fact sheet on vitamin E. For information about vitamin E and COVID, see the ODS consumer fact sheet, Dietary Supplements in the Time of COVID Selenium is an essential mineral found in many foods, including Brazil nuts, seafood, meat, poultry , eggs, dairy products, bread, cereals, and other grain products.
It acts as an antioxidant and is important for reproduction, thyroid gland function, and DNA production. The RDA ranges from 15 to 70 micrograms mcg for infants, children, and teens, depending on age, and from 55 to 70 mcg for adults.
People with HIV have higher risk of selenium deficiency than other people, and this might worsen their infection and increase the risk of death. Some studies have found that selenium supplements might improve immune function slightly in people with HIV, but other studies have not.
Selenium is safe at daily intakes up to 45 to mcg for infants, children, and teens, depending on age, and up to mcg for adults. Taking higher amounts can cause a garlic odor in the breath, a metallic taste in the mouth, hair and nail loss or brittleness, skin rash, nausea, diarrhea, fatigue , irritability, and nervous system problems.
Selenium might interact with cisplatin a drug used in chemotherapy. More information about selenium is available in the ODS consumer fact sheet on selenium. For information about selenium and COVID, see the ODS consumer fact sheet, Dietary Supplements in the Time of COVID Zinc is an essential nutrient found in seafood, meat, beans, nuts, whole grains , and dairy products.
The RDA ranges from 2 to 13 mg for infants, children, and teens, depending on age, and from 8 to 12 mg for adults. Some studies suggest that zinc lozenges and zinc syrup speed recovery from the common cold if you start taking them at the start of a cold.
More research is needed to determine the best dose and form of zinc for the common cold as well as how often and how long it should be taken. Some studies in lower income countries show that zinc supplements lower the risk of pneumonia in young children. Studies show that zinc supplements help shorten the duration of diarrhea in children in low-income countries, where zinc deficiency is common.
Many people with HIV have low zinc levels. This occurs because they have trouble absorbing zinc from food and they often have diarrhea, which increases zinc loss. Some studies have found that supplemental zinc decreases diarrhea and complications of HIV, but other studies have not.
Zinc supplements do not appear to reduce the risk of death in people with HIV. Zinc is safe at daily intakes up to 4 to 34 mg for infants, children, and teens, depending on age, and up to 40 mg for adults.
Taking higher amounts can cause nausea, vomiting, loss of appetite, stomach cramps, diarrhea, and headaches. High intakes of zinc over a long time can cause low blood levels of copper and impair immune function.
Zinc supplements might interact with antibiotics , penicillamine used to treat rheumatoid arthritis , and thiazide diuretics used to treat high blood pressure. More information about zinc is available in the ODS consumer fact sheet on zinc. For information about zinc and COVID, see the ODS consumer fact sheet, Dietary Supplements in the Time of COVID Andrographis is an herb native to Southeast Asia.
It might help your body fight viruses, reduce inflammation , and strengthen your immune system. Some studies have found that taking andrographis after getting a cold or other respiratory infection might lessen the severity of symptoms and shorten the length of time symptoms last.
However, additional studies are needed to confirm these findings. No safety concerns have been reported when andrographis is used as directed. Side effects of andrographis can include nausea, vomiting, dizziness, skin rashes, diarrhea, and fatigue.
Andrographis might decrease blood pressure and thin the blood, so it could interact with blood pressure and blood thinning medications. Andrographis might also decrease the effectiveness of medications that suppress the immune system.
Andrographis might affect fertility, so some scientists recommend avoiding it if you are pregnant or planning to have a baby. For information about andrographis and COVID, see the ODS consumer fact sheet, Dietary Supplements in the Time of COVID Echinacea is an herb that grows in North America and Europe.
It might help stop the growth or spread of some types of viruses and other germs. It might also help strengthen your immune system and reduce inflammation.
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VIDEOS ° VIEW IMAGES. Immune Support Supplement with Zinc Vitamin C Vitamin D IU Elderberry Ginger D3 Goldenseal - Dr Approved Immunity Vitamins for Adults Women and Men - Natural Immune System Booster Defense ct.
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Visit the Protecction. Immune system protection supplements proven protectino boosting ingredients including Vitamin C, Vitamin D, Elderberry, Ginger, Goldenseal, Turmeric, and Zinc, Immune system protection supplements Citrus bioflavonoids and allergy relief 7-in-1 Proteciton Boost provides comprehensive Immune system protection supplements. BioSchwartz Advanced 7-in-1 Immunity Boost formula supplemetns over half a dozen immune support heavy hitters to keep you protected year round. We only use pure, high potency ingredients to ensure every immune booster is absorbed and working the way it should in supporting your immune health. In addition to being an essential vitamin and a key building block for overall health, Vitamin D helps support immune cells as they work to protect against invaders that can impact health. Holistic aromatherapy benefits common dietary supplements claim to supplemengs immune function, but is that really Immune system protection supplements In this Immune system protection supplements Nutrition feature, protechion discuss supplementss benefits and risks of taking dietary supplements and explore Imnune evidence of their effects on the immune system. The immune system is a large network of cells, organs, and proteins. It works to protect the body from harmful microorganisms and toxins. When the immune system works optimally, it does a great job of defending the body. But having a weakened immune system can increase the risk of delayed wound healinginfectious illnesses such as colds, and other infections.Immune system protection supplements -
Vitamin C also functions as a powerful antioxidant, protecting against damage induced by oxidative stress, which occurs with the accumulation of reactive molecules known as free radicals.
Oxidative stress can negatively affect immune health and is linked to numerous diseases Supplementing with vitamin C has been shown to reduce the duration and severity of upper respiratory tract infections, including the common cold Additionally, high-dose intravenous vitamin C treatment has been shown to significantly improve symptoms in people with severe infections, including sepsis and acute respiratory distress syndrome ARDS resulting from viral infections Still, other studies have suggested that the role of vitamin C in this setting is still under investigation 32 , The upper limit for vitamin C is 2, mg.
Supplemental daily doses are typically between and 1, mg Vitamin C is vital for immune health. Supplementing with this nutrient may help reduce the duration and severity of upper respiratory tract infections, including the common cold.
Black elderberry Sambucus nigra , which has long been used to treat infections, is being researched for its effects on immune health. In test-tube studies, elderberry extract demonstrates potent antibacterial and antiviral potential against bacterial pathogens responsible for upper respiratory tract infections and strains of the influenza virus 35 , A review of 4 randomized control studies in people found that elderberry supplements significantly reduced upper respiratory symptoms caused by viral infections However, this study is outdated and was sponsored by the elderberry syrup manufacturer, which may have skewed results Though it has been suggested that elderberry can help relieve symptoms of certain infections and the influenza virus, we also must be aware of the risks.
Some report that elderberries can lead to the production of excess cytokines, which could potentially damage healthy cells For that reason, some researchers recommend elderberry supplements only be used in the early course of COVID It should be noted no published research studies have evaluated the use of elderberry for COVID These recommendations are based on previous research done on elderberries.
A systemic review of elderberry 43 concluded:. Taking elderberry supplements may help reduce upper respiratory symptoms caused by viral infections and help alleviate flu symptoms. However, elderberry also has risks.
More research is needed. Medicinal mushrooms have been used since ancient times to prevent and treat infection and disease. Many types of medicinal mushrooms have been studied for their immune-boosting potential. Over recognized species of medicinal mushrooms are known to have immune-enhancing properties Some research demonstrates that supplementing with specific types of medicinal mushrooms may enhance immune health in several ways as well as reduce symptoms of certain conditions, including asthma and lung infections.
For example, a study in mice with tuberculosis, a serious bacterial disease, found that treatment with cordyceps significantly reduced bacterial load in the lungs, enhanced immune response, and reduced inflammation, compared with a placebo group In a randomized, 8-week study in 79 adults, supplementing with 1.
Turkey tail is another medicinal mushroom that has powerful effects on immune health. Research in humans indicates that turkey tail may enhance immune response, especially in people with certain types of cancer 48 , Many other medicinal mushrooms have been studied for their beneficial effects on immune health as well.
Medicinal mushroom products can be found in the form of tinctures, teas, and supplements 50 , 51 , 52 , Many types of medicinal mushrooms, including cordyceps and turkey tail, may offer immune-enhancing and antibacterial effects.
According to results from scientific research, the supplements listed above may offer immune-boosting properties. However, keep in mind that many of these potential effects these supplements have on immune health have not been thoroughly tested in humans, highlighting the need for future studies.
Astragalus, garlic, curcumin, and echinacea are just some of the supplements that may offer immune-boosting properties. Still, they have not been thoroughly tested in humans.
Many supplements on the market may help improve immune health. Zinc, elderberry, and vitamins C and D are just some of the substances that have been researched for their immune-enhancing potential.
However, although these supplements may offer a small benefit for immune health, they should not and cannot be used as a replacement for a healthy lifestyle.
Aiming to eat a nutrient-dense balanced diet, getting enough sleep, engaging in regular physical activity, and not smoking or considering quitting, if you smoke are some of the most important ways to help keep your immune system healthy and reduce your chances of infection and disease.
If you decide that you want to try a supplement, speak with a healthcare professional first, as some supplements may interact with certain medications or are inappropriate for some people.
Our experts continually monitor the health and wellness space, and we update our articles when new information becomes available. While some germs are airborne, more often than not, illness occurs after you touch a contaminated surface, says Starnbach.
Most often germs move from your hands into your eyes, nose, or mouth, so also make an effort not to touch your face. Keep your body in top shape. Maintaining a healthy and balanced diet, exercising regularly, and getting enough sleep can help keep your body and your immune system working well.
Manage stress. Research has shown that high stress levels may impair the immune system. So whenever possible, try to be aware of your stress levels and work to lower them when they get too high.
Get vaccinated. Getting vaccinated against the flu and other diseases stimulates the immune system to protect against illness. Vaccines teach the immune system to recognize specific pathogens and prepare them to mount a defense if they are encountered. The bottom line is that aside from vaccines, there's really nothing you can take to improve your immune system, so it's probably best to avoid pills and potions that make those types of claims.
As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Please note the date of last review or update on all articles. No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician.
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Sign up now and get a FREE copy of the Best Diets for Cognitive Fitness. People over 50 tend to need more of certain nutrients, including vitamin D, calcium , vitamin B6, and vitamin B However, many standard multivitamins may not contain enough vitamin C.
Researchers believe that milligrams mg a day is necessary for immune health. If a person already has a deficiency, they likely need more of that nutrient than a multivitamin contains. Although some studies suggest that supplementation with multiple immune-supporting micronutrients is beneficial, more research is needed.
Currently, the strongest evidence suggests that these three micronutrients offer immune support: vitamin C, vitamin D, and zinc.
Vitamin C , or ascorbic acid, is a water-soluble vitamin known for its ability to support a strong immune system. In addition to promoting various cellular functions of the immune system, vitamin C helps the body grow and repair tissue, heal wounds, and absorb iron.
Vitamin C is also an antioxidant , meaning that it fights off free radicals, which may help prevent certain cancers and heart disease. Studies show that a vitamin C deficiency can lead to an impaired immune system and an increased risk of infection.
The human body cannot make vitamin C, so it needs to come from foods or dietary supplements. The RDA for vitamin C is 90 mg for male adults and 75 milligrams for female adults.
However, many scientists believe this is not enough and recommend mg per day for maximum health benefits.
While most studies show that taking vitamin C does not prevent colds in the general population, it may help reduce the symptoms and severity of a cold. For example, one meta-analysis from found that taking extra doses of vitamin C may help reduce the duration of the common cold by up to half a day, as well as symptoms such as chest pain, a fever , and chills.
Vitamin C supplementation may be even more beneficial for people who perform heavy physical activity. Vitamin D plays a critical role in keeping the immune system strong so that the body can fight off bacterial and viral illnesses, such as a cold.
Some clinical trials suggest that supplementation of international units IU , or 10 micrograms mcg , of vitamin D per day may help prevent the common cold. Other studies show that vitamin D treatment can reduce respiratory tract infections, especially in those with a vitamin D deficiency.
Some researchers also believe that there is a link between vitamin D deficiency and an increased risk of COVID hospitalization, though there is controversy about this claim.
In some cases, it has been used to minimize the impact of socioeconomic factors for at-risk groups. Many experts believe that the current vitamin D RDA of IU 15 micrograms for people up to age 70 and IU 20 micrograms for people over 70 is not enough to support healthy immune function. However, the evidence remains inconclusive, and finding the dosage that best supports immune function requires further research.
A zinc deficiency can weaken the immune system by impairing the formation, activation, and maturation of lymphocytes, white blood cells that are an active part of the immune system. Several studies suggest that low zinc levels can increase the risk of viral infections.
Some also show that zinc lozenges may shorten the duration of the common cold. However, identifying the best dosages for supporting immune health and treating colds will require further research.
We know that they play a key role in helping maintain a healthy balance of bacteria in the gut, and new research supports the idea that they have beneficial effects on immunity. For example, one study from — carried out, it must be noted, by a company that produces probiotics — found that probiotic use may reduce the incidence and duration of upper respiratory infections.
The authors call for more research to establish a relationship between probiotics and the immune system. Many people are taking one or a combination of supplements to prevent or treat COVID But there is not enough data to support the use of any vitamin, herb, or other supplement to treat or prevent this illness.
Only vaccines , together with strict hygiene measures , are proven to help prevent COVID For severe cases of COVID, doctors may use specific medications. Research does suggest that supplementation with vitamins and minerals can be a low-cost way to support optimal immune function. Even supplementation with vitamins C and D above the current RDAs may be beneficial to the immune system, as long as dosages stay below the recommended safety limits.
Many supplements can interact with medications and other supplements. And combining different supplements can also lead to very high amounts of certain nutrients in the body, which can have potentially severe side effects. For example, excess vitamin C is excreted in the urine and usually causes no serious side effects.
But very high amounts can cause diarrhea , abdominal pain, and nausea. Too much vitamin D — more than 4, IU or mcg — can be harmful and lead to nausea, vomiting, kidney stones , confusion, loss of appetite, and muscle weakness.
Very high levels can even lead to kidney failure, an abnormal heartbeat, and death.
Suppplements Disclaimer: These statements have not Short-term energy foods evaluated Immune system protection supplements the Food protecrion Drug Administration. This product is Immunr intended to diagnose, treat, cure, or prevent any disease. Vitamin C as Ascorbic acidVitamin D as CholecalciferolZinc Picolinate, Ginger Root Powder, Elderberry Extract, Echinacea Herb Powder, Gelatin, Magnesium Stearate, Silicon Dioxide. As a dietary supplement take two capsules once a day. For best results take min before a meal with an 8 oz.
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