I tested this by trnd participatory marketing site is a formula so all family the world is the same product, practice, but if you add all doses taken by our family of 4, the lead bottle at the speed v , no help with one month! it has a system for metering pipettes, not very practical because the liquid escapes from the pipette and it lands on the vêtemnts, soil ... annoying in the morning! the taste is very particular, very sweet orange, my husband and I had a hard time taking it, my oldest got tired of the taste as the days, the last liked, we had still some viruses or stroke tired but obviously a little less people around us