I use Now Foods Fresh Green Black Walnut Wormwood complex, Now Foods Propolis Plus Extract, Now Foods Olive Leaf Glycerite, Now Foods Echinacea Extract, Now Foods Pau D’Arco Extract, Now Foods Echinacea & Goldenseal Plus and Planetary Herbals SinusFree as anti-bacteria, anti-viral, anti fungus, anti parasites immune boosting tonic! Since it is in tincture form, it can be mixed with other herbal tinctures to take together as long as you don’t mind the taste. I take it once every 2-3 days. Tinctures are more potent, easily absorbed thus much fast acting than capsules/tablets. Echinacea is one of the most researched and famous for immune boosting effect. It is anti bacterial, viral and fungal. It is also known as a wide range of uses such as wound treatment, poisoning etc. It would be nice if the product is alcohol free. Pricewise, it is fairly reasonable unless you are using it for a long time as this product is not meant to be. Check out my page for more reviews!