In the absence of carbs, approx 40% of protein and 10% of fat will be broken down into glucose which will then hit the blood stream. If you take a boiled egg which is almost equal parts fat and protein with about 7g of each in a large egg. 40% of that 7g of protein is about 3g and 10% of the 7g fat breaks down to 0.7g carbs, so about 3.7g carbs from the protein and fat in one egg. Say you have 2 eggs, that is about 7g carbs. Add in a bit of salad for and you might get to 10-15g carbs which means that you are not going to be a long way out when you get to your next meal if you don't inject any bolus insulin. If you do that meal a few times and find you are getting reasonably consistently high readings at your next meal time, then you could perhaps experiment with 1-2 units of insulin for a 2 egg salad and see how that goes. Or do a similar calculation for Tuna or ham if that is your preference with a salad. With fat, you would have to eat an awful lot of fat for the 10% conversion to make a significant difference to your overall BG so mostly we ignore that and just calculate the protein. Do bear in mind that meat and fish and eggs are predominantly water though, so whilst an egg might be 60g in weight only 7g of those are actually protein and it will be the same with tuna and slices of ham or beef etc, so don't make the mistake of weighing the egg or the meat and just taking 40% of that. You have to look up the protein content of that meat or fish and then work out how many grams of protein are in your 3 slices of ham of half a tin of tuna and then work out 40% of that....
Hope that makes sense. It can all get a bit complicated which is why sometimes having regular carb portions with every meal is sometimes easier.
On the other hand, I like to make life as complicated as possible and follow a low carb way of eating, so most of my meals do not contain a main source of carbs. You get used to judging protein, just like you would carbs after a while. The advantage is that if I get it wrong I am not going to get it hugely wrong because it might be the difference between just 2 or 3 units of bolus insulin with a meal, so I can never make a big mistake. I often use just 4 or 5 units of bolus insulin in a day eating like this, so any hypos are not really serious ones and if I go high, it is not hug
In the absence of carbs, approx 40% of protein and 10% of fat will be broken down into glucose which will then hit the blood stream. If you take a boiled egg which is almost equal parts fat and protein with about 7g of each in a large egg. 40% of that 7g of protein is about 3g and 10% of the 7g fat breaks down to 0.7g carbs, so about 3.7g carbs from the protein and fat in one egg. Say you have 2 eggs, that is about 7g carbs. Add in a bit of salad for and you might get to 10-15g carbs which means that you are not going to be a long way out when you get to your next meal if you don't inject any bolus insulin. If you do that meal a few times and find you are getting reasonably consistently high readings at your next meal time, then you could perhaps experiment with 1-2 units of insulin for a 2 egg salad and see how that goes. Or do a similar calculation for Tuna or ham if that is your preference with a salad. With fat, you would have to eat an awful lot of fat for the 10% conversion to make a significant difference to your overall BG so mostly we ignore that and just calculate the protein. Do bear in mind that meat and fish and eggs are predominantly water though, so whilst an egg might be 60g in weight only 7g of those are actually protein and it will be the same with tuna and slices of ham or beef etc, so don't make the mistake of weighing the egg or the meat and just taking 40% of that. You have to look up the protein content of that meat or fish and then work out how many grams of protein are in your 3 slices of ham of half a tin of tuna and then work out 40% of that....
Hope that makes sense. It can all get a bit complicated which is why sometimes having regular carb portions with every meal is sometimes easier.
On the other hand, I like to make life as complicated as possible and follow a low carb way of eating, so most of my meals do not contain a main source of carbs. You get used to judging protein, just like you would carbs after a while. The advantage is that if I get it wrong I am not going to get it hugely wrong because it might be the difference between just 2 or 3 units of bolus insulin with a meal, so I can never make a big mistake. I often use just 4 or 5 units of bolus insulin in a day eating like this, so any hypos are not really serious ones and if I go high, it is not hugely high.
Blimey defiantly sounds like you know what are you talking about when it comes to this sort of stuff, I think I understand what you are saying and maybe like you say the only way is too slightly tweak insulin doses here and there. Going slightly off topic but say my bloods were nearing low say 5 and I still had 2 hours till dinner would an apple be enough to avoid a hypo? Thanks again and sorry for all the questions .