INS and Impaired glucose tolerance: However, for people with impaired glucose tolerance, consuming 6 meals (including a bedtime snack) for 12 wk significantly lowered plasma insulin concentrations at 30-min post-OGTT compared with consuming 3 meals per day without a bedtime snack (24) and for those with type 2 diabetes, improvements in HbA1c, and plasma glucose concentrations at 60-, 90-, and 120-min post-OGTT were observed after consuming 6 meals compared with 3 (24).