@Joejunior in theory yes, but then in practice it is complicated since this is not always 2+2 = 4
They have you (or have) to calculate every one with HC you have to click a unit.A ration is 10g of HC.
For example, let's say that I need to prick me a quick insulin unit to metabolize 15g of hydrates, which is ration and average.
So if as something with 30g of hydrates, I sulked me 2 units and if I am at 100 glucose, at two hours I should be more or less in 100, after a curve that can be very ugly and want to turn off theDexcom
I have proven that Normally an insulin unit lowers me about 40 glucose (this is not an example, it is so).
So, if I am 150, I eat something with 30g of HC and I punctuate two units, I would be theoretically again at 150, so if I want to end the dose to 3 unit and end up over 100 or less.
You have to take into account several things such as the physical activity that you are going to do just after eating, and above all take into account the food absorption time, since some can climb very fast and make horrible curves (to avoid itIt makes a "prebrus": you click 5, 10, or 15 min before starting to eat) and others continue to climb much after two hours of having ingested it, when fast insulin no longer has an effect (fucking rice).
Then, even if you do everything well , the reality is something else, every day the body reacts as it gives it a little.Many despair when they see what many illogical things happen and others pass the subject and corrected.
I confess that not as for portions, I look tags and such but then go to the ojimeter.I tire me psychologically doing mental pirouettes before eating.I usually hit and when I don't care, I wear a corrector bolus sometimes even before two hours if I see in the Dexcom that the curve has risen a lot and does not look like down.Then you have to keep in mind that you have a bolus that will last two hours active, and another that has not yet ended its effect, so the curve hits a beautiful descent at the beginning.
From trying so much I already have mechanized what I need for each meal, for example an apple is 2 units, a 3ud sandwich, a yogurt 1 you, a mcmenu of cbo are 14 units, a pizza of Buitoni are 12 ... hahaha
It will always be a roller coaster, but if at the end of the day I see that the estimated hem today is less than 6.5 it is worth it.