According to this article red wine could actually be good for your teeth. Scientists have claimed that it contains chemicals which could help combat tooth decay by stopping bacteria from sticking to the teeth. The findings which are due to be published in the journal Food Chemistry suggest that a glass of red wine a day can help teeth healthy and reduce the need for fillings. Studies have also shown that red wine can improve brain power, boost your immune system and fight diabetes and obesity. Wine. Is there anything it can’t do?