There is no oak in wine. Wine is aged in oak barrels to give it a certain flavor.
The primary health benefit of drinking wine or any other alcoholic beverage in moderation is that it reduces the risk of cardiovascular diseases by about 40%.
Aging wine in oak tends to improve the flavor.
I know of no benefit but that it is the best tasting wine. Strawberry wine, when consumed in moderation, confers the same health benefits as beer, other wines, and liquor. That is, the promotion of good health, largely through improving cardiovascular health and increasing longevity.
Oak wood is used to build wine barrels. The type of oak affects the wine's colour, flavour, texture and tannin profile. In America, white oak is generally used for wine barrels.
Placing wine in oak barrels changes its taste (giving it an oaky or woody taste).
Drinking wine (or beer or whiskey) regularly and in moderation is associated with better health and greater longevity than is either abstaining or abusing alocohol.
storage in an oak cask
in oak barrels or steel vats.
Generally, white oak is used.
Silver Oak
Many reasons - Availability - Relatively easy to bend and shape - Provides the best balance of being tight yet porous (good for aging) - The flavors added to wine from oak complement its flavor
Approximately 2 quarts of wine evaporates from an oak wine barrel in a month. This allows the wine to become more concentrated in flavor and aroma.