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4/5 Strong evidence

Gut health evidence brief

Lactase

Lactase enzyme helps digest lactose-containing foods in people with lactose intolerance, provided the symptoms are actually due to lactose maldigestion.

Strong for lactose digestion health 6 linked sources Content audit 2026-05-05

Headline Finding

Crossover RCT: lactase tablets reduced symptoms and cut 180-minute breath hydrogen by about 55% versus placebo in confirmed lactose intolerance.

Dose Context

Use with the lactose-containing food; dose depends on product enzyme units, lactose load, and individual tolerance.

Important Caveat

Lactose intolerance is not a milk allergy. Persistent, severe, or unexplained digestive symptoms should be assessed rather than self-managed indefinitely.

Source Drawer

Linked Research

6 papers and evidence links - audit 2026-05-05
  1. Review NIDDK lactose treatment
  2. Trial Lactase crossover RCT
  3. Trial Lactase RCT full text
  4. Review Systematic management review
  5. Review StatPearls lactose intolerance
  6. Review MedlinePlus lactose intolerance

How To Read This Rating

The score reflects evidence that the supplement does its stated job. Some jobs are direct, such as strength, endurance, or recovery; others are indirect, such as sleep, mood, appetite, or health support. A real effect can still receive a cautious practical rating when dose, safety, product quality, or audience fit remain uncertain.

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