You may have grabbed a bottle of wine labeled sugar-free, low sulfite or tannin-free and felt somewhat virtuous about it.

However, Andreea Botezatu, Ph.D., Texas A&M AgriLife Extension Service enologist and associate professor, Department of Horticultural Sciences, said some common beliefs about wine don't hold up to science.

Botezatu teaches wine science and winemaking, researches wine quality, and hosts "The Wine Lab," a non-commercial educational podcast that has reached listeners in 72 countries worldwide.