Stronger Immunity Starts Here

The immune system acts as the body’s defence mechanism against infections, diseases, and other harmful invaders. A well-functioning immune system helps prevent illness and promotes faster recovery when sickness occurs. Various factors influence immune health, including nutrition, lifestyle, chronic stress, and environmental exposures, making nutritional supplementation a valuable tool for enhancing immune health. 

Benefits of Key Vitamins and Minerals for Immune Support

Vitamin D3 1000 IU (Tablets and Liquid)

Vitamin D is a fat-soluble vitamin produced in the skin in response to sunlight and is increasingly recognized for its broad health benefits. Due to modern indoor lifestyles, many people fail to get sufficient sun exposure, leading to widespread deficiency.

There are two main forms of supplemental vitamin D—D2 and D3—with vitamin D3 (cholecalciferol) being more biologically active and effective in humans.

Vitamin D3 plays a vital role in immune regulation. It helps balance immune responses—supporting the body’s ability to fight off harmful pathogens while avoiding excessive reactions to harmless stimuli. It enhances the pathogen-fighting abilities of monocytes and macrophages—key white blood cells in our immune defence—and helps reduce inflammation and autoimmune or allergic responses.

Zinc Glycinate

Zinc is an essential trace mineral involved in immune function, wound healing, and DNA synthesis. Minerals can be derived from two main sources: inorganic (non-living) and organic (from living matter). The body generally absorbs organic mineral forms more effectively—such as amino acid-bound forms like glycinates, which are highly bioavailable.

Zinc offers several immune-related benefits:

• Antioxidant Properties: Protects cells from free radical damage.
• Immune Cell Function: Supports the development and performance of immune cells, including neutrophils and natural killer (NK) cells.
• Inflammation Reduction: Helps lower chronic inflammation by modulating the cytokine response. 
• Wound Healing: Plays a role in collagen synthesis and tissue repair which supports the skin as a barrier to infection. 

Vitamin C

Vitamin C is a nutrient that the human body cannot synthesize—meaning it must be obtained through diet. Smokers and individuals under chronic stress are especially at risk for deficiency.

Vitamin C is a powerful antioxidant that protects against oxidative stress and helps regulate inflammation. It also supports immune function in several ways:

• Collagen Production: Vital for skin integrity and wound healing. By supporting the skin barrier, vitamin C helps block pathogens from entering the body.
• Immune Defense: Enhances the production and function of lymphocytes and phagocytes—white blood cells that help eliminate infections.
• Allergy Support: May reduce the severity of allergic responses by decreasing histamine production.

Acidic forms of supplemental vitamin C can cause digestive discomfort in sensitive individuals, so non-acidic or buffered forms are generally better tolerated.

Other Beneficial Immune-Supporting Nutrients

• N-Acetylcysteine (NAC): A highly bioavailable form of the amino acid cysteine. NAC promotes the production of glutathione, the body’s primary antioxidant, helping prevent oxidative damage and reduce inflammation. NAC also thins mucous secretions, alleviating respiratory congestion and reducing infection risk.
• Quercetin: A plant-derived flavonoid with antioxidant and anti-inflammatory properties. Quercetin reduces cytokine production and inflammatory markers and helps stabilize immune cells that release histamine, easing allergic symptoms.
• Decaffeinated Green Tea Extract (Catechins and EGCG): EGCG, the main active compound in green tea, has potent antioxidant and anti-inflammatory effects. It helps inhibit pro-inflammatory cytokines and supports the production of immune cells like NK cells, T-cells, and macrophages, boosting our bodies defences against infection.

Metagenics Product Options for Immune Support

• D3 1000 Tablets: Each tablet provides 1000 IU of vitamin D3 in a pleasant lime-flavored format that can be chewed or swallowed. Available in 30, 60, or 120-count bottles.
• D3 Liquid: Delivers 1000 IU of vitamin D3 per drop in a mint-flavoured liquid. Ideal for those who prefer liquid supplements and includes over 700 drops per bottle—an economical choice.

Note: 1000 IU of vitamin D is suitable for daily immune support. Higher doses should be taken under the guidance of a healthcare practitioner.

• Zinc Glycinate: Provides 22.5 mg of highly bioavailable zinc per tablet. Available in 30 or 60-count bottles.
• Immune Active: A comprehensive immune-support formula that combines vitamin C, zinc, NAC, quercetin, and green tea extract. Available in a 60-capsule format.
• UltraPotent C: Specially formulated for enhanced absorption and bioavailability, this unique supplement offers both water- and fat-soluble forms of vitamin C which prolongs the retention and effect of the product. UltraPotent C is a gentle, non-acidic formula with added vitamin C metabolites to further extend its benefits. Available in 30 or 90 tablets and a tasty chewable option for those who prefer not to swallow pills.

Nutritional supplements such as Vitamin D3, Zinc Glycinate, UltraPotent C, and Immune Active provide essential nutrients that support the immune system's natural defences. These supplements help fight infections, reduce inflammation, and promote overall health.

Choosing high-quality supplements from trusted sources ensures safety and effectiveness. Metagenics is dedicated to producing science-backed supplements with stringent quality control. Their products undergo rigorous testing to ensure purity, potency, and safety, making them a reliable partner in supporting immune health.