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Enzyme · in-depth review

Lactase

Lactase

Lactase is a β-galactosidase that specifically hydrolyzes lactose, cutting it into glucose and galactose. It is used to ease bloating and diarrhea when dairy is eaten.

Also known asLactase EnzymeBeta-galactosidase
Related diseasesLactose intolerance
Related symptomsBloatingDiarrhoea

Marked asPrimarySupporting

Primary

Eases bloating after milk

Lactase cuts lactose into absorbable monosaccharides, so gut bacteria have less fermentable disaccharide and gas and bloating often fall with it. For people whose belly swells after fresh milk, yogurt, or a latte, differences in gas and a softer waist are easier to notice at the meal that contains lactose.

Primary

Reduces diarrhea from lactose intolerance

Uncut lactose pulls water into the gut lumen, which is how osmotic diarrhea and urgency arise; once the enzyme splits the disaccharide, that osmotic load eases. For people who need the toilet after ice cream, cheese, or milk, changes in stool form and urgency are more often noticeable at that meal.

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With foodFor digestion, take at the start of a meal or right after eating. For systemic use, empty-stomach timing may follow the product directions
Best timeWith breakfast, lunch, or dinner; nighttime is not first choice unless the label specifies it
SolubilityWater-soluble

Start with the label, then reassess by post-meal comfort and tolerance.

General wellnessTypical daily intake for general wellness: about, per lactose-containing meal, 3,000–9,000 FCC ALU
Specific needsTypical adult daily safety upper limit is about 18,000 FCC ALU (split across meals); this only addresses lactose intolerance and is not treatment for milk-protein allergy.

How oftenGenerally use as needed, following the product label.

Cautions

Lactase targets lactose only, not milk-protein allergy; persistent diarrhea, pain, or weight loss needs medical evaluation.

Interactions

  1. Public monographs do not list a clear drug conflict; people on medicines should still ask a clinician first
Common side effects

· Mild gastrointestinal discomfort or an unfamiliar taste may occur.

Rare but important

· Some people may have allergic reactions or interactions with medicines.

Long-term dependenceNo typical addiction evidence; do not exceed labeled amounts on your own long term.

Sources

These are institution pages you can check—not a certification of this ingredient.

Medical disclaimerThis page is compiled by the HerbBB editorial team for general health information only. It is not a substitute for advice from a doctor, pharmacist, or other qualified clinician. If you have a health condition, take medicines, or are pregnant or breastfeeding, speak with a professional first.