Dairy Products. Milk doesn't contain yeast, but some other dairy products are made by fermentation, which means that they may contain yeast. If you're trying to avoid yeast, don't eat yogurt, kefir, buttermilk or cheese. Butter, cream and ice cream, however, are not likely to contain yeast.airy Products. Milk doesn't contain yeast, but some other dairy products are made by fermentation, which means that they may contain yeast. If you're trying to avoid yeast, don't eat yogurt, kefir, buttermilk or cheese. Butter, cream and ice cream, however, are not likely to contain yeast.
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