Placebo Controlled Study for Characterisation of Immunological Effects and Safety of Active O2

oxygenised table water containing at least 20 mg O2 per 500 ml (15-fold higher content in comparison to placebo), further excipients: natural mineral water: carbonic acid, oxygen, sodium, potassium, magnesium, calcium, fluoride, chloride, nitrate, sulfate, hydrocarbonate (according to the summary of analysis)

natural mineral water containing the following ingredients: carbonic acid, sodium, potassium, magnesium, calcium, fluoride, chloride, nitrate, sulphate, hydrocarbonate (according to the summary of analysis)