immune support
6 interactions related to immune support
zinc + copper
Zinc and copper share an intestinal absorption pathway through metallothionein, so chronic high-dose zinc (50 mg or more daily) progressively depletes copper, causing anemia, neutropenia, and myelopathy. Co-supplementing copper at roughly 1 mg per 15 mg zinc preserves balance and allows long-term zinc use without copper deficiency.
zinc + vitamin c
Zinc supports innate and adaptive immunity (T-cell maturation, NK-cell function) and inhibits rhinovirus replication; vitamin C supports leukocyte function and skin/mucosal barriers as an antioxidant cofactor. Together they shorten the duration and reduce the severity of upper-respiratory infections.
probiotics + vitamin d
Vitamin D and probiotics share regulatory pathways: vitamin D supports VDR expression in gut epithelium, which probiotics depend on for anti-inflammatory and barrier effects, while certain probiotic strains modestly raise serum 25(OH)D. Combined supplementation outperforms either alone for inflammatory and gut-barrier endpoints in randomized trials.
vitamin d3 + vitamin a
Vitamin D (via VDR) and vitamin A (via RXR, the obligate heterodimer partner of VDR) bind together at vitamin D response elements to drive gene transcription for immunity, bone, and epithelial differentiation. Adequate levels of both are needed for optimal signaling, but at very high doses they can antagonize each other for bone and calcium endpoints.
elderberry + zinc
Elderberry (Sambucus nigra) anthocyanins have antiviral activity against influenza and rhinovirus and reduce pro-inflammatory cytokine signaling; zinc inhibits viral replication and supports T-cell function. Together they shorten the duration and severity of upper-respiratory infections.
vitamin c + quercetin
Quercetin is a flavonoid with antioxidant, anti-inflammatory, and antiviral activity; vitamin C 'recycles' oxidized quercetin back to its active form, prolonging its effect and preventing prooxidant byproducts. The combination has been studied for immune support and antiviral effects.