Hi ebony,
much good advice already. It's interesting to see what a wide range of insulin requirements there are amongst the members here, from the very very low such as totsy to the spectacularly high.
Generally speaking, your insulin needs will be governed by a fairly small number of variables. Diet, obviously,is perhaps the most significant but insulin resistance can still skew things significantly. This is one reason why T1's, who often have little or no insulin resistance, can keep doses low whereas T2's find it much more difficult. There are people out the injecting 3 figure doses if that makes you feel any better!
Body weight, particularly excess adipose fat, tends to mirror insulin resistance fairly closely so you could say that has a direct influence too - overweight and insulin resistance go hand in hand it seems.
Excercise is another significant input in the equation and can make the body's cells much more sensitive to insulin thereby lowering the requirement for the hormone.
The bottom line is that we each have significant levels of control over the inputs to the equation throught the food we eat, the exercise we take and the shape we keep ourselves in.
All the best,
fergus