Thanks for the simple and clear explanation, kt78.
That prompts me to clarify my own regimen. And in doing so, I'll respond to Mr Happy's query.
A few years ago, my diabetic control was described to me by the professor at the Elsie Bertram Diabetes Centre (with disparaging intent, I believe) as 'feeding the insulin'.
And indeed, that's just what I do.
Before I became diabetic (in 1983) I ate breakfast, lunch, afternoon tea, and dinner. (I'd often tend to stuff myself in between: I've always had a good appetite, though I've never been overweight.) And albeit with cultural variations, that's more-or-less the way normal, healthy human beings eat - if they're fortunate enough - all over the world.
Moreover, I believe that's pretty well how most diabetics continue to eat. You yourself, kt78, have effectively just alluded to such a regimen: you said you were about to eat dinner, so you will have given yourself an extra dose of insulin.
But I hardly ever give myself any dose of insulin extra, or lesser, than what I normally take. (I've described what insulin I take in the self-description bit you'll see if you click on my username.)
That's not to say I don't eat lunch and dinner: I do - indeed I always cook dinner for my non-diabetic mother. But by far the most carbohydrate I eat, every day, comes in the form of rye bread.
This begins slowly, after coffee (with milk) first thing in the morning: at first, a bite or two of rye bread (almost always with the delicious Biona Pear & Apple Spread); then a slice of rye, then another slice, then another (plus maybe something else).
Soon it'll be eleven o'clock am, so I take the next dose of insulin. Then I'll eat more rye bread. And then it'll be time for lunch: and maybe I'll have a fried egg sandwich (or something like that), with wholemeal wheat bread.
The day continues in that fashion: I effectively build up a store of slowly digested rye bread, all the way through until four in the afternoon. And that is what keeps me fairly safe for the whole of the day. In this way, my blood-sugar never CRASHES.
Okay, it can certainly go low. But it only ever tends to go down gently, slowly.
Of course, if I'm not careful, I may still have a hypo. (I have to be particularly careful after 4pm, when I take the fast-acting Novorapid insulin.) But it's unlikely: I'd have to be seriously distracted for that to happen.
I just now stopped writing to check my blood-sugar, using Betachek Visual: it was around 3-and-a-bit mmol/l. (And I've just eaten a rather nice, crunchy organic apple.) But that is not a problem.
Indeed, throughout the day I very often tend to get low blood-sugar readings. (How else do you think I manage to typically achieve HbA1c readings of around 5%?!) But that isn't a problem. It would only be a problem if I hadn't been eating rye bread throughout most of the day.
So that effectively completes my response to Mr Happy's query. I agree that with a reading of 2.2 mmol/l late the other night, I was pushing my luck a bit. But I live, and I learn.
The problem with the experts is that they tend to take it for granted that everybody should, or desires, to eat normally - with breakfast, lunch, afternoon tea, and dinner - as though they didn't REALLY have diabetes at all. But that simply isn't realistic.
For indeed I do have diabetes, and I must never forget it.
So I believe I MUST feed the insulin, rather than use the insulin to feed what I eat.
As for people who live in my vicinity - like my three sisters and their cohorts who occasionally come to visit - they have to accommodate TO ME, rather than the other way round. (My mother doesn't have a problem with that, and she lives with me 24/7.) And you can bet that I insist on that, very firmly.
As for the experts, they can get stuffed.
Well, that's just what I do: aside from when I was in the TA (before I became diabetic), and did my basic training at the Royal Greenjackets depot in Winchester - where the cooking and the food was fantastic - I have never eaten better than I do now.