Grape seeds are safe to eat and generally harmless for most people. They contain beneficial compounds like antioxidants, flavonoids, and melatonin, which may provide health benefits such as supporting cardiovascular health, reducing inflammation, and boosting the immune system. While the seeds have a bitter taste and crunchy texture that some may find unpleasant, chewing and swallowing them is not harmful. However, people on blood-thinning medications or with bleeding disorders should consult a doctor before regularly consuming grape seeds, as they may have blood-thinning effects. Overall, eating grape seeds is fine in reasonable amounts and can be beneficial to health.