Eat your grape seeds! Grapes are packed with nutrients, but the seeds may be the best part of all! The seeds deliver a healthy dose of antioxidants, which fight the effects of free radicals in your body. Grape seeds are believed to have other protective properties as well. You may think they taste bitter at first, but seeded grapes tend to be sweeter overall. And seeded grapes still have a low glycemic index. So, go ahead and eat those grape seeds!