Ketone Breath Meter, Professional Portable Ketone Breath Tester, Digital Ketone Breathalyzer with 10 Mouthpieces (Color2)

Works good. I bought this to see what effects my ketosis levels and what doesn't but i'm told that everyone handles different foods and drinks differently. I first tested it after doing a 37 hour fast and it said I was at 40. I tested it again a little while after breaking my fast and it had dropped down saying I was out of ketosis (i don't remember the exact number). I didnt see that it is sensitive to coffee so I tested it after drinking coffee as well and it said I was at 50!! And I hadn't been fasting. Definately recommend!

The first day, it generated a reasonable result of 27, 12 and one 40 that i can accept. Although a big number jump in one day is not that logical. But starting the second day, number keeps at 99 or 90+. I tried what the seller has told me: empty it with 0, and then ensure my mouth is clean, didn't eat right before breathing....etc....still....99.....with morning empty stomach....also, my boyfired who's only one meal without carb, tested 47....i also tested that, if i only breath in for 5 seconds, or if i let some air in when i breath into the meter, number is around 50.....definitely not accurate.I already initiated the return. Will buy a blood meter.....although i don't want to prick my finger....but better than wasting money at nothing

I've now had this device for 9 months and it still works like a charm.It does give surprising or counter-intuitive results sometimes but I've learned some interesting patterns around the various factors that can influence my degree of ketosis including intermittent fasting, sleep quality, my exercise, diet, etc.No big surprise, but I tend to be in Ketosis more when I workout hard, go into caloric deficit, and avoid sugars and carbs. Also tend to be more in Ketosis in the afternoons.I recommend this product for anyone trying to monitor and optimize their health

I think this is a very good value for the money.It does have one quirk, though. It should be "zeroed out" before each use. Simply turn it on and let it cycle without blowing through it. If it doesn't read zero, then try it again until it does. At that point, it's ready to use.I was having an issue where it would read very high a few times, so I clear it out before each use now.I have tried it with other family members to make sure that the results are consistent. With all three of us, it has been.Also, if you've been doing keto for a while, don't try to index the results with urine test strips as they measure a different chemical than the breathalyzer. If fact, the urine test strips are good for a while just at the beginning of your diet. This type of machine is the best way to test.

For "normal" use, like on a low-carb diet, this monitor appears to do a great job. It gives plausible and consistent readings. On a pretty clean almost-no-carb diet, I was seeing readings between 14 and 47 ppm, depending on the day. My diabetic wife whose insulin is nearly always elevated consistently reads 0 ppm. So far, so awesome.The problem is that I started an extended water fast three days ago. My BrAce (breath acetone) quickly rose to 51 ppm, then 65, then 65, then 65.... You probably see the issue. This device doesn't seem to be able to measure/display any values above 65 ppm. Fasting BrAce values in adult humans can be expected to occasionally exceed 100 ppm. Children with epilepsy on a low carb diet: over 300 ppm. Diabetics experiencing (dangerous) diabetic ketoacidosis: well over 1000 ppm.If you aren't in any of those "strong ketosis" categories, this device seems fine. Great even. But if you are, this device becomes *mostly* useless. I have been logging my BrAce values for a couple weeks, and was looking forward to seeing what my values would look like deeper into this fast. But now, there's no point even using the device anymore. It would have been nice if the item description made this limitation clear.Good for most people, useless to some.

Almost returned it as it do not power on but figured out the battery I had was too old. Tried it a few times and find its repeatbility is actually pretty good. I am now convinced it is a piece of device I will keep and use.

This is a really handy device. I received it and found that I was not quite in Ketosis. I adjusted my macros and a couple of days later I tested again - right in the optimal state of Ketosis!If you are serious about keeping yourself in an optimal range for weight loss, this is the device you need!!**Air passage folds down for compact storage and many moth guards are included.

Says 10 begins the optimal ketosis range, but I tested after having ate carbs all day and it showed 10. There's no way. Junk