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Yes, lactose is playable

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"Lactose" Definition

noun

A disaccharide, C12H22O11, found in milk, that may be hydrolyzed to yield glucose and galactose.
A white crystalline substance obtained from whey and used in infant foods, bakery products, confections, and pharmaceuticals as a diluent and excipient. Also called milk sugar.
A disaccharide sugar CHO that is present in milk and yields glucose and galactose upon hydrolysis and yields especially acid upon fermentation.