Sulfites are a source of much discussion in wine making. Let’s start our discussion by finding out exactly what sulfites are and why they’re important to winemakers.

Sulfites occur naturally on all sorts of foods, including grapes, garlic, onions and lots of other plants. This is nature’s way of preventing the growth of microbes.

In wine making, sulfites are used by wineries as a preservative and sterilization agent. They also use sulfites during the initial grape crush to kill off the native yeasts that occur on all wine grapes. When the wild yeasts have been eliminated the winemaker can introduce his own yeast to better control the fermentation and also the end product.

Are sulfites dangerous? The answer is yes, they can be. A person who is sensitive to sulfites can have asthmatic reactions and also headaches that range from mild to severe and even life threatening. If you’ve ever had a bad headache from one glass of wine, you may be allergic to sulfites.

There are laws that regulate the use of sulfites, and manufacturers are required to label all products that exceed 10 parts per million. Wine containing less than 10 PPM sulfites don’t have to be labeled. In fact, the use of sulfites has been banned for use in fresh fruits and vegetables by the FDA.

You can find wines produced by some wineries that contain no sulfites, although some folks will argue that grapes naturally contain sulfites and so therefore can never be sulfite free. However, the levels of sulfite can be so low as to be undetectable, and the winemaker will add no sulfites at any time during the process. Wine purists are able to appreciate the bouquet and fruit flavors of a wine without sulfites.

So, should you use sulfites in your homemade wine? My answer is yes, as recommended by the kit or recipe that you’re following. But it’s really a personal decision, and there’s lots of room for argument and experimentation.

I believe sulfites make up for less than sanitary conditions that are present during homemade wine making, and can extend the shelf life of your wines. I would, however, encourage experimentation on your part if you think you’d like to try making wines without adding sulfites.

Just ensure your cleaning and sanitizing are impeccable and give it a try!