Hi Gina Marie,
It has to be Less Than one gram of carbs. I looked and it is one full carb. Therefore, it's illegal.
I make my own in my Instant Pot. I am not sure this link will work here; but try it. If not, I will figure another way if you are interested in trying to make it yourself. Be sure to see that I actually used 5 drops Rennet last time in the notes. It did help the curds to firm up more quickly but your don't have to use it.