1. To figure out if you can eat those bars and drink crystal light, calculate the net carbs in each and see if that fits into your daily carb limit. To help you find out how to do this, we have a quick guide you can find here:
https://www.ruled.me/faq/how-do-i-calculate-net-carbs/

After a quick look at these products, I think crystal light is a good keto-friendly drink, but the bars that I could find nutrition facts for seem to have enough net carbs in them that you need to be much more mindful of how many you eat and the other net carbs you are eating throughout the day.

2. Yes, this is normal and your ketone levels may increase as the days progress. Continue doing what you are doing as long as you are getting the results you want.
If you want to deepen your ketosis levels, you can also limit your net carbs more strictly and increase your activity levels.

3. Fasting and eating the small amount that you eat on the days when you aren’t hungry is actually going to make you lose weight more quickly. The only problem with eating such a small amount of calories is that you will lose some muscle mass (unless you eat enough protein) and you may run the risk of mineral and vitamin deficiencies if that’s how you eat on most days.

Does all of this make sense? If you have any other questions, please let me know.

The small 1.5 means that you are probably in ketosis. Since it is your 6th day, you are probably excreting fewer ketones than in the beginning and may notice fewer ketones being excreted in your urine as you continue on the keto diet (which means you may get false negative readings).

As long as you are sticking to the keto diet, getting the results you want, and feeling good, there is no need to worry about your ketone levels.

Does everything make sense now? If you have any other questions, let me know.

If you want an accurate measurement of ketones, you’d have to use a different method like blood ketone testing.

I’m sorry that you are not getting the results that you expect. There are a couple of strategies you can use to help you get the scale moving. You can find them in this article:
https://www.ruled.me/ketogenic-diet-weight-loss-plateaus/

If you have any other questions, please let me know.

To see if you are consistently in ketosis throughout the day, a good time to test would be about 1-2 hours after you eat your biggest meal of the day. This will tell you what your ketone levels are during the time when they are most likely the lowest. Then, if you want to know what your ketone levels are when they are likely to be at their highest, measure them before your first meal (or right after fasted exercise, if you exercise).

These measurements will give you a good idea of what range your ketone levels fall between throughout the day.

These ketone levels are not dangerous. Many health professionals say that 1.5 to 3 is ideal, but between 3.3 and 4 is fine as well. Being at this level of ketosis may actually confer more therapeutic benefits than having lower ketone levels.

Are you eating more protein or carbs than you did on the other diets? Both macronutrients can keep you from getting into ketosis consistently.

Also, how are you measuring ketosis? If you are using the urine sticks, they may be giving you false negatives because they only detect the ketones that you are excreting from your body, not the ketones you are actually using.

You might be interested in this article that Craig wrote about different types of alcohol and keto:
https://www.ruled.me/ketogenic-diet-and-alcohol/