Preparing a syrupy product containing vitamins, comprises: inerting apparatus introducing a sugar syrup and vitamins into the apparatus in an inert atmosphere adding dehydrated and deoxygenated glucose syrup under an inert atmosphere deoxygenating the obtained syrupy product and packaging the syrupy product under an inert atmosphere. An independent claim is included for a pressurized bottle comprising the syrupy product obtained by the process. ACTIVITY : Metabolic Osteopathic. MECHANISM OF ACTION : None given.