Finally, organic foods are healthier for you. The research on whether consuming organic food is healthier for people remains inconclusive. However, the USDA’s own tests show that most non-organic produce contain residual pesticides even after washing. The long term effects of consuming these pesticides has not been sufficiently studied, but they can’t be good for you.

For more information, take a look for yourself – Why buy organic?

This not only pertains to table grapes, but wine grapes as well.

Residues of these chemicals are found on table grapes as well as those used for wine production. Some of these chemicals are known to be detrimental to your health such as having negative effects on the central nervous system. – source