Scientific works demonstrated that the mortality by cardiovascular hurts was relatively weaker among the French people, the first consumers of wine to the world, than in the other industrial nations.
The term of French paradox was introduced to indicate this phenomenon. These profits were demonstrated by the researchers on the longevity, the memory, the protection against the cardiovascular diseases and of numerous cancers.
This said you should not forget that the wine is, and has to stay, a product of "pleasure" consumption  and to conitnue this pleasure, it is obviously necessary to consume it in moderation.