Actually, you can eat the same "high GI food" like white bread with butter and its GI goes DOWN. This is because eating fat with your high GI foods decreases it

Actually, you can eat the same "high GI food" like white bread with butter and its GI goes DOWN. This is because eating fat with your high GI foods decreases its GI value! So really, GI is a useless measure for this and many other reasons.