Originally Posted by EvilTOJ
Nope, it's just a vitamin
, it will work just fine. Preservatives you need to watch out for are ones like sodium metabisulfite or potassium metabisulfite.
Where did you get that idea? calcium lactate is not a vitamin, it is there to balance the acidity of the apple juice and to buffer the apple juice.
Lactate ions are the conjugate base
of lactic acid
and are as such slightly alkaline. The addition of calcium lactate is usually only done when the acidity of the apple juice is to high. Sticking to one pH will propbably make for a more consistent flavour.