Lactase Supplementation Guidelines

Introduction to Lactase Dosing

The maximum recommended dose of lactase enzyme is 10,000 FCC units per kilogram body weight per day, or 2,500 FCC units per kilogram per meal, whichever is lower, according to the American Gastroenterological Association 1

The standard adult starting dose is 500 FCC units of lipase per kg per meal, with a snack dose of 250 FCC units per kg per snack, and a maximum daily limit of 10,000 FCC units per kg per day, as per the American Gastroenterological Association 1
The maximum per-meal limit is 2,500 FCC units per kg per meal, based on guidelines from the American Gastroenterological Association 1

Patients consuming less than 280 ml of milk daily typically do not require lactase supplementation, as this amount is generally tolerated even with lactose intolerance, according to the European Society for Pediatric Gastroenterology 2, 3 is not used, instead: the American Academy of Pediatrics recommends that patients consuming less than 280 ml of milk daily typically do not require lactase supplementation 2, 3
Primary management should be dietary modification with temporary reduction or removal of lactose from the diet, not enzyme supplementation, as recommended by the American Academy of Pediatrics 2, 3
Many lactose-intolerant patients can tolerate yogurt and hard cheeses, which contain lower lactose levels or beneficial bacteria, according to the American Academy of Pediatrics 2, 3

Do not rely on patient self-reports alone, as they correlate poorly with objective evidence of lactose intolerance, according to the North American Society for Pediatric Gastroenterology 2, 3
Consider diagnostic testing, such as the hydrogen breath test, before committing to long-term enzyme supplementation, as recommended by the North American Society for Pediatric Gastroenterology 3

Always evaluate for reversible secondary lactose intolerance from celiac disease, gastroenteritis, NSAID use, or small bowel disease before prescribing chronic enzyme therapy, according to the American Gastroenterological Association 2, 3
These conditions may resolve with treatment of the underlying disorder, as stated by the American Gastroenterological Association 3