This lozenge delivers 23 mg of **zinc** per serving — right in the middle of the clinical range (15–30 mg) used in studies on immune function. The zinc comes as a blend of citrate and gluconate, both well-absorbed standard forms that are appropriate for a lozenge format. If you follow the label directions of up to 6 lozenges daily during a cold, your total zinc intake would reach 138 mg, well above the tolerable upper limit — which is why the product caps use at 7 consecutive days.

**Vitamin C** is included at 100 mg per lozenge as ascorbic acid. That covers your daily RDA (90 mg) in a single lozenge, but falls well short of the 250–2,000 mg range typically studied for immune support. At maximum dosing (6 lozenges), you would reach 600 mg — a more meaningful amount for your immune system during acute illness.

**Echinacea purpurea** appears at just 20 mg from stem, leaf, and flower. Clinical trials showing cold-reduction benefits use 300–1,500 mg of standardized extract, putting this dose at roughly 7% of the minimum studied amount. At this level, echinacea is unlikely to contribute meaningfully to your results — the zinc is doing the heavy lifting here.