Canning tomatoes: what is best? Citric acid, vinegar or lemon juice?
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When canning tomatoes safely at home, be sure to use tested canning recipes that add citric acid, vinegar or lemon juice. Tomatoes are a medium-acid food with a pH in the range of 4.5–5.2. You must use a tested canning recipe that has determined the amount of acid to add in order to increase the acidity by lowering the pH… …click to read more…