The difference between urine ketone testing and blood ketone testing is simple. The urinalysis strips will only measure dietary ketones – i.e., ketones which are produced as a result of the breakdown of fat in our digestive system. When the fat content of our food becomes adequate and the carbohydrate levels fall, the body produces ketones and they appear in our urine when they’re unused.
Blood ketones, however, are only shown in quantities above 1.5mmol when the body is releasing fat from its current stores of body fat. This indicates usage of stored fat for fuel as well as indicates the production of ketones from dietary sources. This is a measurement of nutritional ketosis, i.e., ketosis as a result of both intake of dietary fat and use of stored reserves of fat for fuel.
Yesterday, for the first time, I measured my blood ketones using my wife’s new glucometer/ketone meter. I’ve measured my blood sugar a few times and while I’m not thrilled with where it is, it’s not bad. When I measured my blood ketones yesterday, however, I found I was at 2.2mmol, which is a fantastic measure of how deeply my day’s meals kept me in ketosis. And above 2.0mmol is good indeed.
The drawback is, I can’t do this every day. In fact, ideally, I’d be doing this a few hours after every meal. But at about $5/strip plus shipping … yeah, I don’t think so. So, I have to suffice with trying to make a correlation between weight loss and blood sugar at best. Or just continue to keep an eye on my macronutrient intake and levels. Nevertheless, I can be happy to know our lifestyle, at least insofar as yesterday’s meals are concerned, has successfully moved us into ketosis (my spouse had levels of 2.0mmol) and we can be sure there will be weight loss, slow and steady, so long as we maintain those balances.
Down to 238.6 today, and looking forward to today’s meals.