Ketones are negatively-charged molecules, which means they’re acidic. When you build up ketone bodies in your system, you’re building up acid. This high fat/low carb diet may also help improve certain other neurological disorders like Alzheimer’s disease and Parkinson’s disease,3 according to the Epilepsy Foundation. Yogurt and cottage cheese are high in protein and calcium-rich. Five ounces of plain Greek yogurt provides just 5 g of carbohydrates and 12 grams of protein. The same amount of cottage cheese also has 5 grams of carbohydrates with 18 grams of protein.