Hi Lisa Marie and welcome!
I lost all my weight low-carbing and I love it. Used Atkins, which is my favorite and IMO, the best low-carb plan out there. We have a nice Atkins forum included in the low-carb area of the board here....if you are interested.
I'm not sure about the apple cider vinegar thing but do know that Braggs (the one who sells the liquid aminos) makes a nice healthy apple cider vinegar you can buy at health food stores.
Good luck.....and hope I may see you in the Atkins/low-carb area.
deena