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Re:Can a product with "0g sugar" contain lactose? by lesuorac on Wednesday August 14, 2024 @11:54AM (#41247492)
https://patents.google.com/patent/US7829130B2/en via https://www.reddit.com/r/chemistry/comments/1claif5/getting_...

From my understanding they take advantage of lactose being smaller than milk and they just get the milk "stuck" in the filter and then throw out the unfiltered lactose.

Re:Can a product with "0g sugar" contain lactose? by theGeatZhopa on Thursday August 15, 2024 @02:07AM (#41253488)
They remove a part of the lactose first, then add lactase. It's not as sweet anymore then.