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Lactase

What the research shows

No concerns

none of the findings here link it to harm

An enzyme that breaks down the sugar in milk.

It breaks down lactose in milk to make lactose-free milk products.12

What research says

Studies in people

  • No harm found

    IBS symptoms3

    In people with IBS, lactase did not change gut symptoms, which seemed unrelated to milk sugar digestion.

The signal at the top counts the findings in people and in animal and lab studies. A concern in studies of people outranks animal and lab studies, and “No concerns” needs at least one finding in people. When most findings in people point one way, the page leans that way (“Mostly”), and every finding is still shown. Findings whose study type is not stated are shown but not counted. This page is a reference, not medical advice. It describes what regulators and published research say. Talk to a doctor or dietitian about your own diet.

Products

The 6 most-scanned of 1,326 products on Open Food Facts that list lactase.

  • High Protein Joghurterzeugnis - Heidelbeere Milbona · 200 g 3 additives
  • Yogur High Protein Coco Milbona · 200 g 2 additives
  • Raspberry-Pomegranate Milk Product Milbona · 200 gram 3 additives
  • Chocolate Flavour Shake Arla PROTEIN · 500 g/482 ml 3 additives
  • Strawberry Milk Product Milbona · 200 g 2 additives
  • Core Power High Protein Milk Shake Chocolate fairlife · 14oz 5 additives

References

  1. 1Lactase: ingredient taxonomy entry. Open Food Facts.
  2. 2Lactase. Wikipedia. Accessed September 29, 2026. CC BY-SA 4.0.
  3. 3Lisker R, Solomons NW, Pérez Briceño R, Ramírez Mata M. Lactase and placebo in the management of the irritable bowel syndrome: a double-blind, cross-over study. Am J Gastroenterol. 1989;84(7):756-62.