A winemaker in the USA can add any of these acidity adjusters to their wine without disclosing the info to the consumer. calcium carbonate malic acid tartaric acid lactic acid potassium bicarbonate sodium bicarbonate potassium hydroxide sodium hydroxide ammonium carbonate ammonium chloride ammonium hydroxide magnesium carbonate sodium carbonate The only way to know what is in your wine is to ask the winemaker directly. Shake your Winemaker's Hand

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Or make it yourself as you know (and buy from you). For 5 years— I would make with an older Italian man. 8 Demijohn’s (about 450 litres) each year. He was old school. Grapes, a hopper to crush, big barrels to ferment, and a nice Torchio to press. It wasn’t a connoisseurs vino, and I t was very strong but clean. I would get hangovers easy when I used to drink, and especially if I had different drinks, or store bought wine— but never when I just drank the wine we made. It was often a liter at a minimum consumed. Zero additives— just a lot of drunk hornets buzzing around 50 or so empty wooden grape boxes. Shake their hand indeed.