GIP and type 2 diabetes mellitus: In Ob + Pre-T2D, GIP (10 nM) also decreased lactate production (Ob + Pre-T2D: GIP (0 nM), 45.33 ± 15.61 nmol/mg of VAT vs. GIP (10 nM), 25.21 ± 5.99 nmol/mg of VAT, Δ −44.39%, p < 0.05).