Another way that you can easily do to lower insulin levels is to leave sedentary lifestyle aka lazy motion.
It does not have to be the hard way, you can take the time to take a leisurely stroll in frequent frequencies. This way is allegedly better than if you just sit still for a long time.
A 12-week study found that insulin levels in women walking for 20 minutes after eating fell faster than women who did not walk after meals. In addition useful for lowering insulin levels, walking is also useful to lower body fat so it makes you look more fit.