A low carb diet is a high
fat one
not a high protein one. That can be incredibly bad for you as protein metabolism involves quantities of nitrogen to be disposed of. You don't need to restrict calories and you shouldn't restrict fat either. Just cut your carbs right down and you will be OK. Take a multi vit, vitamin D3, a good omega-3 fish oil and some magnesium. Your protein level should be about 35g per meal not per day.
Read this:
Why Low-Carb Diets Must Be High-Fat - Second Opinions, UK to explain why you need fat.