Hi,
@LornaFarrell , the thinking behind it is that as pulses are relatively low on the glycemic index, and tend to break down into glucose quite slowly and steadily, then there's a risk that if you bolus for them as you would for any other carbs, the insulin will be getting to work before the pulses have turned to glucose, so you might drop.
To give an example, I'll occasionally have a slice of quiche at the sandwich shop next to my office, with some feta salad and some mixed beans, I'll bolus for the quiche crust, and maybe just a smidgen more, but not much, for beans depending on the portion size.
That way, I've got the bolus onboard and dealing with the fast crust, and a combination of the tail end of the bolus along with my basal will take care of the beans ok.
If not, and it's looking like the beans are contributing to a rise further down the line, another unit or two will pin that, easy enough to keep an eye on with cgm.
If there's a larger amount of beans, I'll maybe increase the bolus but with a shorter pre-bolus timing so that there is a better chance of matching the slower absorption with the insulin peaking, but a lot depends on the other components of the meal.
I've often found pulses can be very useful for smoothing out lines.