While some low-carb diets allow for the carbohydrates found in plant-based foods, others restrict them almost entirely — namely, the ultra-trendy ketogenic diet. Since these foods contain the highest amount of water and dietary fiber, it's crucial to consider both the short-term side effects (constipation) and the long-term ones (increased risk of GI cancers and decreased immune function).
You mentioned ketone strips. If they are the urine strips they are useful to see if you are in ketosis, fat burning mode, but be aware they are not completely accurate but are a good guide to how you are doing. The blood strips are way too expensive but more accurate. I have a blood glucose monitor and went through a phase of testing to see how I react to dairy, protein, cream, coffee etc. I rarely do it now as I want this way of eating to be as simple as possible, but again, a useful tool starting out.
Another mineral you may want to supplement is potassium. While there is no concrete evidence that a dramatic potassium loss occurs on a low-carb regimen, Sondike says to ensure against problems he recommends patients use Morton's Light Salt -- a potassium chloride product that he says can add back any of this important mineral that's lost. Eating a few almonds is also a good way to supplement this mineral without adding carbs to your diet.
my children regularly make themselves smoothies, bacon (2 minutes in the microwave covered with kitchen paper), scrambled eggs with cheese in the microwave (mix 2 eggs, cheese, milk – 1 minute, stir, 30 seconds, stir, 30 seconds, stir). They used to moan and complain there are no cereals in the house, but they have learned to cook their own breakfasts and look for what ingredients we have rather than reach for a box of cornflakes