Immune Support Supplements for Year-Round Wellness

We tend to think of the fall and winter months as peak sickness season, but the truth is that bacteria and viruses pose a threat throughout the year. For this reason, it’s always important to eat a nutrient-dense diet, participate in regular physical activity, get enough sleep each night, and include immune support products in your supplement routine. These practices will keep your body’s natural defenses strong and ready to fight off invading pathogens no matter what month it is.

At U.S. Doctors’ Clinical, our mission is to create supplements that not only provide solutions for existing health complaints, but also nourish the body and promote vitality to help you keep living a full, active life. We’ve developed a lineup of immune system-supporting supplements that contain vitamins, minerals, and compounds like phytonutrients, polyphenols, and coenzymes to encourage cell defense, promote the production of mucus, lymphocytes, and phagocytes; provide good bacteria for a healthy gut, and so much more!

older couple smiling at each other while eating breakfast

Formulated for maximum effectiveness, our Immune Support supplement collection includes Vitamin C, Zinc, Lung Support, PhytoPlex, OxyPlex, and Gut Health. Check out the benefits of each product below!

Vitamin C

When taken on a consistent basis, Vitamin C can encourage the production of certain cells that destroy intrusive germs before they cause infections.* The most popular immune system booster of all, vitamin C has antioxidant properties that can help to defend cells against free radical damage and signs of premature aging.* It also promotes collagen production, encourages the absorption of iron from plant sources, and supports a healthy white blood cell count.* Low vitamin C levels can increase susceptibility to germs and viruses, so keep this supplement handy at all times!

a glass of orange juice and a bowl of oranges on table


A newcomer to the U.S. Doctors’ Clinical family, Zinc is a powerhouse supplement. Combined with calcium and magnesium, zinc plays a role in the production of digestive enzymes and aids in cell turnover for healthy intestinal linings.* These three essential minerals encourage the production of immune cells and the reduction of oxidative stress.* Zinc helps to promote the absorption of magnesium, which promotes the absorption of calcium, which is crucial for strong bones and teeth.* A catalyst for enzymatic processes throughout the body, zinc also facilitates wound recovery and tissue repair.* Add U.S. Doctors’ Clinical Zinc to your supplement arsenal to encourage good health in any season.

Lung Support

Our proprietary Lung Support formula contains herbal extracts like astragalus, Asian ginseng, mulberry root, and radix ophiopogonis to support optimal lung health and promote healthy mucus production to remove bacteria and viruses from the respiratory tract.* Natural ingredients soothe aggravated tissues, help to calm chronic cough, and encourage natural healing processes.* With vitamin C for additional immune support, Lung Support also provides nutrients for heart, liver, and kidney health.* Whether you’re trying to quit smoking, get rid of a lingering cough, nourish your lungs for continued ease of respiration and healthy tissue development, or all of the above, Lung Support is the clinically proven supplement you want in your corner.*

Asian ginseng root in bowl on table


Packed with over 20 potent plant extracts, PhytoPlex delivers phytonutrients, polyphenols, bioflavonoids, and coenzymes to support a healthy diet and fill in nutrient gaps.* These compounds perform vital roles throughout the body, working to slow aging, support relief from tissue aggravation, promote good circulation for organ health, and encourage healthy metabolism and comfortable digestion.* PhytoPlex includes time-tested extracts like garlic, ginger, rosemary, and green tea to support healthy immune system responses to pathogens and encourage optimal organ function for sustained wellness.*

rosemary growing in small pot


A unique blend of antioxidant-rich compounds including tannins and polyphenols, OxyPlex aids the natural defense of cells against free radical damage and oxidative stress, promoting cell health and supporting vital organs.* Red wine extract, vitamin A, and citrus bioflavonoids encourage red blood cell production and healthy circulation, and green tea extract contributes to the maintenance of normal blood pressure levels.* Vitamin C, selenium, and vitamin E provide immune system support by promoting the activity of phagocytes, t-cells, and neutrophils.* For comprehensive cell defense, look no further than OxyPlex!*

Gut Health

Gut Health is not just another run-of-the-mill probiotic supplement. It contains a probiotic strain called bacillus coagulans, which doesn’t just offer temporary relief for digestive issues – it forms spores in the gastrointestinal tract that replenish good bacteria for the continuous support of digestive processes.* Because the gut microbiome makes up roughly 70% of the immune system, a healthy balance of bacteria is crucial to keeping sickness at bay. A fortified gut can also defend against autoimmune conditions, leaky gut, and stress that causes digestive discomfort. Supplementing with Gut Health can support an ideal balance of gut bacteria for long-term benefits and optimal gastrointestinal health!*

U.S. Doctors’ Clinical offers immune support supplements that promote total-body wellness by protecting the cells and organs against germs and viruses, encouraging the proliferation of healthy gut bacteria, and providing nutrients for optimal organ function.* Great for year-round use, these products can help you build up your body’s natural defenses so that you can keep going strong through any season.* Shop our Immune Support collection today to round out your supplement stack and boost your vitality!*

man and woman in jackets and boots walking golden retriever through fall leaves

*These statements have not been approved by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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