Dr. Bernstein's method advocates covering protein with regular human insulin due to its slower onset and longer duration.

“and the essence of the Burnstein method if you read his book is to try to cover protein with insulin and he uses regular insulin not short-acting humalog or novalog and the idea is the regular insulin is a' which is human insulin has a peak of onset within approximately an an hour or two in at last for six to eight hours and so it roughly very roughly corresponds with the kinetics of what protein will do to your glucose”