Hi Tracy. Welcome to this thread. Most of the answers you are looking for are in the "Art and science of low carb living" by Phinney and Volak. If you have not read it, I suggest you do. Here's my 2c worth on your experiences .... The dizziness, etc usually lasts 1-2 weeks, but as Dean said, you MUST increase your salt intake. Also, potassium can be a cause. There is no concrete answer for leto adaptation time, everyone is different. Bad breath - I believe this is caused by too much lean protein. When going low carb its really easy to just up the protein content to compensate. I believe this is a mistake. Try to get more of your daily food from veggies, salads and add some olive oil or butter. And when you do have protein, look for bits with fat on, not fillet or lean mince. Constipation usually goes together with bad breath - same issue as above. For measuring ketones, there are 3 methods: 1. urine sticks - about R120 for 50 sticks iirc. They measure acetoacetate so are only useful for the first 3-4 weeks while you body is adapting. They will also show ketones after this period if you continue to eat MCT/Coconut oil. 2. Blood sticks - http://www.abbottdiabetescare.co.uk/your-products/other-meters/freestyle-optium R20 per stick!!! You buy a small meter made by Abbott health care and take a finger prick blood samle to get a reading. This measures beta-hydroxybuterate which is the ketone in the blood. this is the gold standard of measurement at the moment but expensive. These meters also measure glucose - like diabetics do each day. There is a reasonably good, but not perfect, correlation between glucose and ketones so you may find it cheaper just to measure glucose as a proxy for ketones. glucose strips are R2 each. 3. breath meters. you can order a breath meters from http://www.ketonix.com +-R1200 delivered to SA. I have one of the earlier ones and it has limitations but will give a reasonable reading when compared to the blood readings. Lastly, you may want to rethink the whole idea of measuring ketones. What advantage is it going to give you? After 2 weeks strict LCHF, you will probably find that you have ketones in both your blood and urine, but if there is still dizziness, it may just meant that your body s not using them efficiently yet - this is what takes 2-3 weeks. Persevere with your diet and tweak it so that the hunger, halitosis, etc go away and then see what happens to your weight (if that is the goal) or blood markers, or any other measurement you like.