What exactly are you trying to get out of your food photography? I mean are you trying to capture the pattern in a slice of kiwi? or are you trying set a scene around a plate or item of food?
For the kiwi shot then yes a macro lens would work best. For the plate a short zoom would be the best option.
I can only think of one or two shots where I used a macro lens for food photography. When using my D300 I generally got my best shots with my 18-70mm. I haven't had an opportunity to shoot any food shots with my D800 but I think I would stay in the equivalent range lens wise so probably my 28-105mm.
If I was going to use a macro today, I would probably stick with the sigma 150mm that I recently purchased, because it lets me get 1:1 while at the same time allowing me some distance from my subject giving me room for lighting and creative angles.