[BrianSCohen]

Cereal is often almost totally carbs. Checking with my friend (fitday.com) A cup of cheerios is 23 g of carbs (2.5g fiber), adding a cup of milk is another 12g (74% of calories from carbs) (YMMV). All bran with fiber is 46 g of carbs (but 30g fiber) (56% of calories from carbs). Many consider that fiber can be subtracted out and does not affect blood sugar. In either case, high carbs.

Most cereals are also simple carbs, rather than complex carbs. Complex carbs are typically who foods that need to be broken down to be absorbed by our bodies. Simple carbs are already broken down and go right in. Naturally, the blood sugar response from simple carbs is quick, complex carbs have a longer and blunted response, clearly better.

I I have cereal, I will have oatmeal for breakfast. Steel cut is the best, being a whole grain (albeit cut by steel). If you must have cold cereal, try to choose one that is high in fiber and mostly consists of whole (or nearly) grains providing complex carbs.

In either case, being consistent in the kind, amount of cereal and amount of milk will give you the best chance of matching your insulin to carb intake. In general tho, lower carb intake will be easier to more closely match to insulin dose.