In some of my fruit wines I will use citric acid instead of acid blend because I think it tastes better.Thanks Cenk, I never thought of kmeta being used for anti browning. I may or may not go that route. When I would cut apples up for the kids, they always went into a bowl of water and lemon juice. It really enhanced the flavor of the apples. I doubt it would change the flavor of the wine in any meaningful way, but I trust it because of experience. I did also plan on adding some kmeta to the must anyway.
Kmeta bonds to free oxygen, so reduced oxidation and also less oxygen for yeast to use to multiply.
Good luck with your wine!