Hello everyone, I believe that the studies done so far have considered all possible variables such as different ethnicities, lifestyles in general as well as the health conditions of the various subjects. However, they have forgotten the most important variable, which is the quality of the ingredients in multi-vitamins. We cannot assume that a hatchback can perform as well as a Porsche, even if they are both cars. All supplements still have no real discipline and, as yet, there are no testing requirements for manufacturers. Raw materials are of vegetable origin and are imported from third countries without any quality guarantee. Supplements often contain bacterial contaminants such as aflatoxins, heavy metals, active ingredient titres that do not correspond to those declared, and dosage variations from batch to batch can have an effect on human health. Glauco