Living Versus Dead Food: Ahimsa food!
My vegetable shopwala in Sasthamangalam (Thiruvananthapuram) had told me years ago that a cabbage with outer leaves partly eaten by worms should be preferred to the clean, shining one. Reason: Poison content is less, as the worm survived to start eating!
Another tip: If they are kept in the open for sale, select the bunch of grapes on which a house-fly is sitting.
M G Warrier