Lactase
Lactase
Snapshot
Lactase is a digestive enzyme that breaks down lactose into glucose and galactose, improving tolerance to dairy products and supporting gut comfort.
What is Lactase?
Lactase is an enzyme produced in the small intestine that catalyzes the hydrolysis of lactose, a sugar found in milk and dairy, into simpler absorbable sugars.
Where It Comes From
Lactase is naturally expressed by intestinal epithelial cells; supplemental sources derive from microbial fermentation (Aspergillus or Kluyveromyces species) and are available in tablets, capsules, and drops.
Key Nutrients & Compounds
Supplemental lactase provides active enzyme units (often expressed in FCC Lactase Units) that facilitate lactose breakdown in the digestive tract, preventing malabsorption and discomfort.
Health Benefits
Lactase supplementation alleviates symptoms of lactose intolerance, including bloating, gas, and diarrhea; supports nutrient absorption from dairy; and enhances dietary flexibility.
Recommended Dosage
Dosage varies by product potency; typical preparations provide 3,000–9,000 FCC Lactase Units per serving, taken immediately before consuming lactose-containing foods or beverages.
How to Use It
Take lactase supplement at the start of a meal or beverage containing lactose; adjust units based on dairy volume and personal tolerance; store in a cool, dry place.
Who Should Use It?
Individuals with lactose intolerance or reduced lactase production seeking to digest dairy comfortably; those transitioning to a low-lactose diet but wishing occasional dairy intake.
Possible Interactions or Cautions
Generally safe; uncommon allergic reactions to microbial source proteins; those with severe dairy allergies should not use lactase as it does not remove milk proteins.
Final Thoughts
Lactase enzyme supplementation offers an effective, on-demand solution for lactose intolerance, enabling individuals to enjoy dairy products without gastrointestinal distress.
Scientific Studies
He T, Venema K, Priebe MG, Welling GW, von Wright A, Satokari RM. Effects of Lactobacillus casei strain Shirota-fermented milk on gut microbiota and symptoms in lactose-intolerant individuals. Appl Environ Microbiol. 2008;74(18):5710–5715. https://doi.org/10.1128/AEM.01042-08
Shimizu H, Kobayashi T, Sano T, Akedo I. Controlled clinical trial on the efficacy of lactase tablets in lactose malabsorption. Clin Nutr. 1998;17(2):79–82. https://doi.org/10.1016/S0261-5614(97)80034-9
Misiewicz JJ, Woolner JT, Spencer JM. Lactose breath hydrogen curve after ingestion of a digestive enzyme. Dig Dis Sci. 1975;20(10):805–811. https://doi.org/10.1007/BF01360824