Syrah being considered the superior version, giving wines higher in phenolics. As a general rule, most Australian and South African wines are labeled "Shiraz", and most European wines (from such regions where varietal labeling is practiced) are labeled "Syrah". In other countries, practices vary and winemakers (or wine marketers) sometimes choose either "Syrah" or "Shiraz" to signify a stylistic difference in the wine they have made. "Syrah"-labelled wines are sometimes thought to be more similar to classic Northern Rhône reds; presumably more elegant, tannic, smoke-flavoured and restrained with respect to their fruit component. "Shiraz"-labelled wines, on the other hand, would then
Phenolic content in wine produce grapes with higher levels of resveratrol than warmer, drier wine regions such as California and Australia. Different grape varieties tend to have differing levels, with Muscadines and the Pinot family having high levels while the Cabernet family has lower levels of resveratrol. In the late 20th century interest in the possible health benefits of resveratrol in wine was spurred by discussion of the French paradox involving the health of wine drinkers in France. Piceatannol is also present in grape from where it can be extracted and found in red wine. Vanillin is a phenolic aldehyde most commonly associated with