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Best Immune-Boosting Supplements For Your Medicine Cabinet

  • 4 min read

The best supplements to boost your immune system are the ones that fill in the gaps where your diet might be lacking. Addressing any nutritional deficiencies is the first step in giving your immune system the support it needs to do its job. Vitamin and mineral deficiencies can lead to an increased susceptibility to getting sick because the immune system can't do its job properly. Plus, as we age, we are more likely to be deficient in different nutrients so our personal supplement needs may change.

The best preventative measures are a healthy diet full of nutrient-dense foods such as fruit, vegetables, whole grains, healthy fats and protein. A strategic supplement routine can work in conjunction with food to enhance the immune support. Specific supplements can help improve sleep quality and minimize stress which are also keys to fighting harmful invaders. Here are the best supplements to have on hand to support your immune system:


Vitamin C - This vitamin is probably the most well-known for supporting the immune system. Vitamin C is a powerful antioxidant that our bodies do not produce so we have to obtain it from food or supplements. Although rare in the U.S., a vitamin C deficiency can actually hinder our immune system’s ability to fight off illness. It’s key in the growth and repair of body tissues and for fighting free radicals to help prevent disease. Some studies have shown that a vitamin C supplement could reduce the length and severity of cold or flu symptoms. A supplement may be particularly important for smokers who tend to have lower vitamin C levels.

Zinc - This mineral plays an important role in normal immune function because it promotes the growth and balance of immune cells. In the case of a zinc deficiency, the immune system may weaken, allowing harmful bacteria or viruses to enter the body and spread. Some research has shown that zinc supplements could be a helpful treatment for common colds by reducing the severity when taken at the onset. And when combined with vitamin C, like NB Pure’s Zinc Up+ spray, you have a powerful immunity support supplement. NB Pure also has OnSet Immunity Boost which combines the dynamic duo of zinc and vitamin C with the addition of the antioxidants vitamin A and selenium for protection when you feel a cold coming on.

Vitamin D - Vitamin D is vital for bone health and even mental health. A deficiency can affect the function of several of the body’s systems including the immune system. Research has shown that low vitamin D levels are associated with an increased risk of infection. Because sunlight is our main source of vitamin D, in some regions it can be challenging to get enough during the winter months. Pills are easy to forget, but NB Pure makes a convenient Vitamin D3 spray that you can take with you on the go. 

L-theanine - Since sleep is an immensely important factor in immune support, if you are not getting enough quality sleep, it could be time to try a supplement to help you get some shut eye. L-theanine is an amino acid compound that is typically found in green or black tea and some mushrooms. Ever heard of drinking tea to relax before bed? L-theanine might be why this is effective. A 2018 study found that participants who were treated with L-theanine versus a placebo reported greater sleep satisfaction after eight weeks. NB Pure’s Power Down is a non-habit forming supplement designed specifically to promote relaxation at bedtime and contains L-theanine. 

Selenium - This lesser-known immune-boosting mineral functions as an antioxidant in the body to prevent and reduce oxidative stress. Doing so is essential for decreasing inflammation which enhances immune function. Research has found that higher levels of selenium in the blood are linked to better immune function and a deficiency could result in a slower immune response and therefore a greater susceptibility to illness. Immune+ Daily Immune System Boost is a blend of many of these vitamins, minerals and adaptogenic mushrooms including selenium. Three capsules daily will provide a daily immunity boost to ward off illnesses and keep you feeling strong.

But what if I still get sick? Here’s some things you can do to lessen your symptoms and the duration of the illness:

Start with the basics - 

  • Drink plenty of fluids. Water is the best, but tea or no sugar electrolyte drinks may also be helpful.
  • Rest. Your immune system is using extra energy to fight off the illness.
  • Eat nutritious foods. Choose colorful fruits, vegetables and make sure to get adequate protein.

Then take six capsules daily for five days of NB Pure’s OnSet.

It’s specifically formulated to be taken when symptoms start and make you feel better faster. OnSet is a combination of powerful nutrients, like vitamins C, A, zinc and selenium, coupled with a blend of 18 different herbs that have immune boosting properties.

Don’t just wait until you’re sick to protect yourself. Daily supplements can help support immunity on a regular basis. It’s always a good thing to protect your health throughout the year. If you are interested in a customized supplement routine, speak to a medical professional and they can advise you individually.