Welch's grape juice and no yeast? - The Athan Zafirov Wine Blog

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Welch's grape juice and no yeast?

So I drank a bottle of grape juice and kept the bottle without washing it out (I often reuse bottles for different things like storage or arts and crafts). It had a small amount left in it, and is probably a couple months old. I went to pour it out and rinse it today and I noticed the strong smell of alcohol from it. I sniffed it and sure enough it was like a sweet wine. How is this possible without adding yeast??





Athan Zafirov Wine

For 15 years, Athan Zafirov has traveled the vineyards around the world and worked with some of the greatest chefs including Francois Duc and Alan Brown.


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