Going back to the original post, that bar is 40g, and at 29.7g carbs per 100 g, that equates to just 11.9g carbs in a 40g bar. Approx the same carbs as in a Lidl protein roll, which are mentioned enthusiastically on the forum amongst low carbers.
I would happily eat one of those bars and then test to see what my blood glucose reaction is.
My handbag often has Peanut 9bars and Kind nut bars in it - both of which work out at around 15g carbs/bar, and they come in very useful on occasion, if i have been busy and left it too long between meals, or as a replacement for lunch. The important thing is that they don't impact my blood glucose - in contrast to other things with fewer carbs that do (for example, a slice of Burgen bread, 11g carbs, or half an apple, 10g carbs). The trick seems to be that these bars are slow release nuts and seeds.
I am currently having a Peanut 9bar a day at lunch time while i am away from home, to keep me going til evening when i can eat properly.
So yes, bars like that can easily fit into a low carb lifestyle (I am counting LC as being anything up to 130g carbs a day).
They are also tasty, relatively slow release, they don't trigger my reactive hypoglycaemia, don't spike my blood glucose, and they are a lot less processed than things like Atkins and protein bars which seem to be stuffed with protein powders, wood alcohols and artificial sweeteners.
So thank you
@Ella1973 the next time I pass Primark I will get one and see what it does to my blood glucose.