ask dr. vinny

Hello there! I'm Dr. Vinifera, or "Vinny" for short. Ask me your toughest wine questions, from the technical aspects of winemaking to the fine points of etiquette. I hope you find my answers educational and even amusing. Looking for a particular answer? Check my archive and my FAQs.


Dear Dr. Vinny,

Is there any way to test red wines for possible artificial coloring? We were tasting some Chilean reds and it appears to leave a residual tint on one’s tongue and teeth. Admittedly, they were not high-end labels.

—J.R.E., Capo Beach, Calif.

Dear J.R.,

If you’ve ever been to a large wine tasting, say our Grand Tour, you might start to notice that most everyone in the room has a purple grin. That’s not from food coloring, it’s just a side effect of tasting red wine, which can have quite a bit of pigment in it, and that pigment can stain your tongue and teeth.

Some red grapes—Petite Sirah and Cabernet Sauvignon come to mind—have more pigment than other grapes, and there are practices a winemaker might use to coax more pigment (and flavor) out of a grape. I find it helps to think of grapes like tea bags—the longer they steep, the more color and flavor you’re extracting.

It has nothing to do with a wine being high-end or not, but how much pigment ends up in your mouth has a lot to do with the pH in your saliva and the protein on your tongue. If you haven’t eaten in a while, and if you’re dehydrated, your tongue will be more purple (purpler?) than if you have been drinking water and have recently eaten. You also might like to read my tips for dealing with red-wine teeth.

—Dr. Vinny


Do you have a question for Dr. Vinny? Ask it here...

Wine Basics

We break down the basics—how to taste, serve, store and more. Plus:
» Maps of major wine regions
» Grape variety characteristics

How-to Videos

Learn to taste wine like a pro, pull a cork with flair, get great wine service in a restaurant and more

Wine Spectator School: All courses are FREE for WineSpectator.com Members

Learn from the experts and get the most out of each sip. Take one of our online courses or take them all—from the ABCs of Tasting to in-depth seminars on Food Pairing, California Cabernet, Bordeaux, Tuscany, Sensory Evaluation and more.

Browse our course catalog
Check out the professional wine sales and service courses
Learn Wine Forum: Got questions? Get answers

MEMBER LOGIN

= members only

Keep me logged in      Forgot Password?

Free Email Newsletters

Sips & Tips | Wine & Healthy Living
Video Theater | Collecting & Auctions

» View samples
» Or sign up now!
» Manage my newsletter preferences

Classifieds

The marketplace for all your wine needs, including:

Wine Storage | Wine Clubs
Dining & Travel | Wine Auctions
Wine Shops | Wine Accessories