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Also other, more concentrated dairy products: cheese, yogurt, sour cream, etc. Making cheese requires lots of cow's milk, removes much of its moisture (hence i

• dredmorbius 11y ago
  :) I'd though of adding that as well, though skipped it. I'd like to look at cheese cost per unit nutrition (calories, protein, fat). I think it tends to remove much of the carbohydrate content. But yes, fermentation == early food preservation.