What makes Nexabiotic Immune Support lozenges better than other lozenges for colds or flu is our research. Nexabiotic Immune Support is doctor formulated and has the following clinically tested ingredients to help support the immune system's fight against the cold or flu so that you can feel better, quicker: Zinc - Studies have found that zinc lozenges may reduce the duration of cold from a median of 7.6 days to 4.4 days. Elderberry - Elderberries are thought to prevent or shorten the duration of herpes outbreaks, decrease pain and inflammation, and reduce symptoms of upper respiratory infections. Many people consider the elderberry plant one of the most powerful for preventing and treating colds and influenza and swear by its antiviral properties. One placebo controlled study found an improvement in 2 days in 93.3% of subjects using elderberry syrup compared to 6 days in 91.7% of subjects that received a placebo. Vitamin C - Vitamin C has been studied for many years as a possible treatment for colds, or as a way to help prevent colds. A meta-analysis found that vitamin C (1-6 g/day) decreased the duration of the cold episodes by 0.93 days. Probiotics - The combination of Lactobacillus acidophilus and Bifidobacterium animalis lactis probiotics by children during winter months has been found to reduce fevers by 53%, coughing by 41.4%, runny nose by 28.2%, antibiotic use by 48%, and reductions in days absent from group child care when compared to placebo.