Black currant tonic is simply two ingredients: Organic Apple cider Vinegar and Black Currants. Long term extraction at low temperatures and low Ph preserves the antioxidants that make this so healthy for you.   Black Currant – one of the most power sources of natural mineral ascorbics (Vit C).  That’s important  for your immune system. Great flavor. Deep and mysterious. Very old world. In new and Old England they use it in beer and hard cider to make a snake bite or a “dark”. Here in the States we see it in brandy and gin as a mixer.  We like it in mineral water or in plain seltzer.  Ours is grown on the mineralized soils of the Finger Lakes, New York, far from industrialized urban areas.  New addition to our offering on.  We like to say  “Tart and Smart” – Sometimes called Ribena and Cassis in Europe.  This tonic is very tart.  No sugar to sweeten the deal.    You can add stevia to take the edge off.  Experiment please.