Immune Function · Minerals
Vitamin C and vitamin D get most of the attention during immune season, but two trace minerals quietly do a lot of the work: zinc and selenium. Individually each supports normal immune function, and together they complement one another in ways that matter most where it counts, at the cellular level, where well-supplied immune cells can develop, communicate, and manage oxidative stress the way they are meant to.*
Reviews of nutrition and immunity consistently list zinc and selenium among the essential micronutrients for normal immune competence, noting that adequate intake supports immune cell function while shortfalls can leave the system less prepared.1
Zinc and Your Immune Function
Zinc is a trace mineral that plays a fundamental role in supporting the immune system. Although required in small amounts, its impact is significant. It is involved in the development and function of immune cells, particularly white blood cells.*
One of zinc's roles is to support the normal immune response. It supports the development of T cells, white blood cells that help coordinate immune activity, and it contributes to the production of cytokines, the signaling molecules that keep the response organized.*
Because the body does not store zinc in large amounts, steady daily intake matters. When zinc runs low, immune cell function can be affected, which is why zinc is a mainstay of immune-focused nutrition.*
Selenium and Its Immune-Supporting Properties
Selenium is another essential mineral that supports immune function. Like zinc, it is needed in small amounts yet plays an outsized role. Selenium supports the normal function of immune cells, including T cells and macrophages.*
Selenium supports the production of glutathione peroxidase, an antioxidant enzyme that helps protect cells from oxidative damage. That matters because immune cells work in a high-oxidative-stress environment. Selenium's antioxidant support helps neutralize free radicals that could otherwise stress cell membranes, DNA, and proteins.*
By supporting cellular health, selenium helps immune cells stay ready to do their everyday work.*
Zinc builds and activates immune cells; selenium helps protect them from oxidative stress. Supplied together, this mineral pair supports immune cells at the cellular level so the whole system can function the way it is meant to.*
Zinc and Selenium Working Together
Both minerals are valuable on their own, but they complement each other in ways that support the immune system as a whole.*
Antioxidant teamwork
Selenium supports glutathione peroxidase while zinc supports superoxide dismutase. Together these antioxidant systems help immune cells manage oxidative stress, supporting healthy immune function.*
A balanced inflammatory response
Both minerals contribute to a measured, well-regulated inflammatory response, which supports comfortable, healthy immune function over time.*
Cellular function
With adequate levels of both minerals, immune cells are better equipped to respond, communicate, and recover, supporting immune resilience through the seasons.*
Gene expression
Zinc and selenium both play roles in gene expression that support normal immune cell function and the everyday synthesis of proteins immune cells rely on.*
Adding Zinc and Selenium to Your Diet
Getting these minerals from food is straightforward, and a varied diet covers a lot of ground. Here are some of the best sources of each.
Foods rich in zinc
- Pumpkin seeds: easy to add to salads, yogurt, or smoothies.
- Oysters: one of the richest natural sources of zinc.
- Red meat: lean beef and lamb are good sources.
- Legumes: beans, lentils, and chickpeas for plant-based zinc.
- Nuts: almonds, cashews, and peanuts make an easy snack.
- Whole grains: quinoa, oats, and whole wheat.
Foods rich in selenium
- Brazil nuts: just a couple provide plenty of selenium.
- Seafood: tuna, sardines, and salmon.
- Sunflower seeds: a simple salad or yogurt topping.
- Eggs: versatile and easy to work into any meal.
- Whole wheat bread: whole grains contribute selenium.
- Mushrooms: shiitake and button varieties.
Supplementing What Your Meals Provide
Whole foods come first, but meeting your daily zinc and selenium needs through diet alone can be tricky for some people. In that case, a well-formulated supplement can help fill the gap.*
Zinc
Choose a form your body absorbs easily, and be mindful of dose, since too much zinc can affect copper balance. Pico Zinc® Plus pairs picometer zinc with copper to support healthy mineral balance.*
Selenium
Selenium is best in a gentle, bioavailable form, and a little goes a long way, so follow recommended guidelines. Pico Selenite® provides selenium in an absorbable trace-mineral form.*
- Zinc supports the development and function of immune cells; selenium supports antioxidant defenses that protect them.*
- Together, the two minerals support healthy immune function at the cellular level.*
- Food comes first (seeds, seafood, Brazil nuts, eggs), with absorbable supplements to fill any gap.*
References: 1. Maggini S, Pierre A, Calder PC. Immune Function and Micronutrient Requirements Change over the Life Course. Nutrients. 2018;10(10):1531. doi:10.3390/nu10101531.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.