The combined use of quercetin with vitamin C as well as vitamin D and zinc, are ingredients strongly supported by scientific studies* which encourage their early intake both for the prevention and treatment of respiratory infections, particularly including Covid-19 .
The nutritional supplement Igactive® Respiraid includes in its composition Vitamin C, Quercetin, vitamin D3, Zinc, as well as cow's colostrum titrated to provide 10mg of antibodies per maximum daily dose as well as propolis and thyme extract, all in a scientifically formulated content and ratio.