The Short Version
Pasteurization does cause small, measurable reductions in certain heat-sensitive vitamins — notably B1, B2, C, and folate — but the word "removes" significantly overstates what happens. Peer-reviewed systematic reviews and government assessments consistently describe the overall nutritional impact as minimal, with most vitamins well-retained. Fat-soluble vitamins, minerals, and macronutrients are largely unaffected. Commercial milk is also often fortified with vitamin D, offsetting any processing losses. The claim contains a grain of truth but paints a misleading picture of substantial vitamin loss.