Grapes are a rich source of vitamin C and thus help in a lot of things including gastritis. It's one of the best fruit juices. The antioxidants present in the grape juice helps you keep your body very healthy and strong. There are benefits from drinking even a glass of grape juice every day. It helps prevent your body from showing ageing signs. Also it boosts your immunity system and restores your lost energy after tiring day. Grape juices also have in it a lot of iron which is also very important for your body. Other than all these, this juice is also very beneficial for your skin and also helps prevent liver disorders.