Best Immunity Supplements for 2025

Caroline Igo
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Your immune system is designed to protect your body against infections that can lead to illnesses. But the winter months can make it harder to keep your immune system firing on all cylinders. The days are still short — even if they are finally getting longer — the skies are still dreary more often than not, and snow or ice can keep us inside and away from proper sunshine for days on end. Strengthening your immune system through diet, exercise and other strategies can help keep you from getting since in these final months of cold and flu season, and with immune-boosting supplements, you can also help with vitamin deficiencies like vitamin D and vitamin C.

To help you boost your immune system and stay healthy, we’ve rounded up the best immunity-boosting supplements packed with essential vitamins.

Which vitamins are good for boosting immunity?

When deciding on the best multivitamin or immunity supplement, pay attention to which vitamins and nutrients are included on the label. The best vitamins, minerals and herbs for immunity include:

The following supplements contain high amounts of the above immunity vitamins. 

<div content="LIST ITEM" superlative="Best budget immunity supplement" description="

Dosage: 2 softgels, taken daily with a meal

Nature’s Bounty has been around for over 50 years and is a brand that constantly appears on our best vitamin lists. Its products are all non-GMO and contain no artificial colors, flavors, sugar, starch, milk, lactose, soy, gluten, yeast, sodium or fish.&nbsp;

Two softgels of its Immune 24 Hour Plus supplements contain 750 mg of vitamin A, 1,000 mg of vitamin C, 15 mcg of vitamin D, 2 mg of vitamin B6, 666 mcg of folate, 6 mcg of vitamin B12, 600 mcg of biotin, 10 mg of pantothenic acid, 25 mg of magnesium, 15 mg of zinc, 17 mg of elderberry, 16.5 mg of echinacea and 16.6 of astragalus. Other ingredients include rice bran oil, gelatin, vegetable glycerin and 2% or less of carob powder (color), natural caramel color, sunflower lecithin and yellow beeswax.

These immune boosting supplements rely on the immunity support of Ester-C, a version of vitamin C that lasts up to 24 hours in the body. Its high doses of vitamin A, zinc and B vitamins also support immune function.

Take two softgels daily, preferably with a meal. One bottle will last about 25 days.

Pros:

  • Contains Vitamin C that will stay in your white blood cells for up to 24 hours
  • Packed with 13 vitamins, minerals and herbal supplements

Cons:

  • Not vegan, contains yellow beeswax and gelatin
  • One bottle lasts only 25 days

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<div content="LIST ITEM" superlative="Best capsule immunity supplement" description="

Dosage: 2 capsules, daily with a meal

The Vitamin Shoppe has brick-and-mortar stores across the country, as well as an online store. The familiar brand name offers a couple of immunity supplements, and we’ve included the best two on this list.

A serving of its Immune Essentials contains 1,000 mg of vitamin C, 50 mcg of vitamin D3, 50 mg of zinc and 250 mg of elderberry extract. Other ingredients include hypromellose (capsule), rice flour, magnesium stearate and silicon dioxide. The capsules are free of gluten, dairy, soy, nuts, sugar, salt and preservatives. Elderberry extract can support a healthy immune system during cold and flu season.

Take two capsules daily, preferably with a meal. One bottle will last about 30 days.&nbsp;

Pros:

  • Does not contain any sugar
  • High potency of vitamin C, vitamin D3 and zinc

Cons:

  • Contains only three vitamins and one herbal supplement
  • One bottle will last only 30 days

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<div content="LIST ITEM" superlative="Best kids' immunity supplement" description="

Dosage: 1 to 2 gummies

Olly is sold at Target, CVS, Walgreens and Amazon. The company’s products are also certified by the National Sanitation Foundation, which guarantees that products have met strict standards for public health safety. Olly is also B-Corporation certified, meaning that the corporation is transparent about environmental performance (such as its waste management) and social performance (like employee benefits).

Depending on the serving size, Olly’s Kids Immunity supplements contain 15 to 30 mg of vitamin C, 2.5 to 5 mcg of vitamin D, 1.5 to 3 mcg of zinc, 50 to 100 mg of acerola cherry extract (a rich source of vitamin C), 35 to 70 mg of Wellmune baker’s yeast beta glucan (a researched and lab-grown nutrient with multiple health benefits) and 12.5 to 25 mg of elderberry juice powder. The gummies are gluten-free and made with natural colors and no artificial flavors. The other ingredients include glucose syrup, beet sugar, water, gelatin, citric acid, natural flavor, pectin, coloring (from sweet potato, apple, radish, cherry, carrot and chokeberry juices) and lactic acid.&nbsp;

Olly recommends that children aged 2 to 4 should chew only one gummy a day. Those aged 5 and up can chew two gummies a day. Consult with your doctor before giving your children any supplements. One bottle will last anywhere from 25 to 50 days if taken daily.&nbsp;

Pros:

  • Easy for children to chew
  • Great taste that children will like

Cons:

  • Recommend seeking a doctor before giving any vitamins to children
  • Easy for children to confuse gummy vitamins with candy

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What causes low immunity?

If you have low immunity, this is often due to certain diseases or genetic disorders. Additionally, it can be caused by poor diet. It can also be caused by certain medications such as chemotherapy.

The information contained in this article is for educational and informational purposes only and is not intended as health or medical advice. Always consult a physician or other qualified health provider regarding any questions you may have about a medical condition or health objectives.

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