The invention relates to a new beverage with a stimulating effect on the basis of caffeine, ascorbic acid, iron in ionic and/or complexed form, organic and inorganic food acids, mineral salts, sweeteners, auxiliary agents, vitamins and aromatic substances as well as water, which beverage contains the above-named substances preferably in a homogeneous mixture or solution characterized in that it contains at least one synergetically effective systemic combination of the three key components caffeine, ascorbic acid and iron--generating a lasting feeling of well-being in a person consuming the beverage--in which combination an additional, i.e. fourth key component is integrated, namely 3,5,5-trimethylhexanal, whereby the above-named four key components are present in the following concentrations in relation to 1 liter of beverage:

            Caffeine                 100 mg/l to 180 mg/l
            Ascorbic acid            200 mg/l to 350 mg/l
            Iron                       5 mg/l to 10 mg/l
            3,5,5-trimethylhexanal   0.5 .mu.g/l to  1.5 .mu.g/l.

The invention also relates to a process for manufacturing the beverage and a concentrate suitable for that purpose.