I, too, get concerned about being too 'acidic' because I've heard (from responsible medical people) that it's not healthy for the body. I don't worry about getting into 'ketosis,' but when I was stalled, I lived on meat/eggs for about a week. I didn't feel so great (and didn't lose much), and I was VERY acidic. I find that by eating enough green veggies, I can maintain a good balance and be primarily alkaline. I can get enough protein from my fish and meat but not remain acidic so long as I have about 25-30g carbs with my veggies each day.