Elderberry
In every dose: Proprietary Immunoblend 1,000 mg.
Elderberry Supplementation Reduces Cold Duration and Symptoms in Air-Travellers: A Randomized, Double-Blind Placebo-Controlled Clinical Trial.
Black elderberry (Sambucus nigra) supplementation effectively treats upper respiratory symptoms: A meta-analysis of randomized, controlled clinical trials.
COVID-19: Is There Evidence for the Use of Herbal Medicines as Adjuvant Symptomatic Therapy?