{"id":14814,"date":"2026-03-17T11:44:07","date_gmt":"2026-03-17T11:44:07","guid":{"rendered":"https:\/\/winescurated.com\/glossary\/sulfites\/"},"modified":"2026-03-17T11:44:07","modified_gmt":"2026-03-17T11:44:07","slug":"sulfites","status":"publish","type":"wcp_glossary","link":"https:\/\/winescurated.com\/uk\/glossary\/sulfites\/","title":{"rendered":"Sulfites"},"content":{"rendered":"<p>Sulfites (sulfur dioxide or SO\u2082) are chemical compounds naturally produced by yeast during wine fermentation. They act as preservatives, also commonly added by winemakers to prevent bacterial growth, spoilage and oxidation. All wines contain sulfites, whether natural or added, ranging from 50 to 100 mg\/L. In the US, wines with more than 10mg\/L of sulfites must be labelled &#8220;Contains Sulfites&#8221;.<\/p>\n","protected":false},"author":4,"featured_media":0,"template":"","glossary_category":[113],"class_list":["post-14814","wcp_glossary","type-wcp_glossary","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What are Sulfites? 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