No, they are either plant-based, animal or synthetic. However, all products are endogenous substances or substances that occur naturally.
Plant-based active ingredients are always checked for heavy metals and microbiological parameters in every batch. All other products are checked on a random basis. For raw materials that originate from fermentation processes or synthetic production, it is not necessary to check every batch, but ZeinPharma still carries out random checks in order to be able to guarantee the high quality targets that have been set. The production of these raw materials takes place in closed facilities so that contamination is unlikely.