Sulphites are substances that naturally occur in wine, some foods and the human body. Along with being a natural by-product of the winemaking process, sulphites are a centuries old tool used by winemakers to halt the fermentation process, sanitize equipment, prevent the growth of micro-organisms and preserve the flavour and colour of wine.
All wines, even organic, contain sulfites. Sulphur dioxide is a natural by-product of the fermentation cycle. Small amounts of sulfite are needed in wine to protect it against oxidation (browning) and unwanted bacteria to ensure that wine will age gracefully, and to improve the overall flavour and quality of the wine. When you make wine from kits, your finished wine will contain the minimum amount of sulfite preservative needed to make good wine every time. By following the recipe, your wine will generally contain lower levels of sulfite than commercial wines.
There is no such thing as ‘sulphite free’ wine and for most people sulphites are safe to consume. If you have concerns regarding sulphites these should be discussed with your health professional.
Also home made wine and wine kits typically contain less then 1/2 the sulpites found in commercial wines.