Lactase
The digestive enzyme that breaks down lactose, providing relief for lactose intolerance.
Also known as: Lactase Enzyme • Beta-galactosidase
Overview
Lactase is an enzyme produced in the small intestine that is essential for the digestion of lactose, the sugar found in milk and dairy products. Individuals with lactose intolerance have a deficiency of this enzyme, which leads to digestive symptoms like bloating, gas, diarrhea, and abdominal cramps after consuming dairy. Lactase supplements provide an external source of this enzyme, allowing people with lactose intolerance to enjoy dairy products without the uncomfortable side effects.
Key Benefits
Enables Dairy Digestion
Provides the necessary enzyme to break down lactose into simpler sugars (glucose and galactose) that can be easily absorbed.
Prevents Lactose Intolerance Symptoms
By digesting lactose, it prevents the fermentation of undigested sugar in the colon, which causes gas, bloating, and diarrhea.
Expands Dietary Options
Allows individuals with lactose intolerance to consume nutrient-rich dairy products without discomfort.
Dosage & How to Take
Lactase dosage is measured in Food Chemical Codex (FCC) units. The required dose depends on the amount of lactose in the meal and the individual's degree of intolerance.
| Purpose | Dose | Notes |
|---|---|---|
| Small amount of dairy (e.g., splash of milk in coffee) | 3,000 FCC units | Typically 1 capsule/tablet. |
| Moderate amount of dairy (e.g., a slice of cheese, yogurt) | 6,000 FCC units | Typically 2 capsules/tablets. |
| Large amount of dairy (e.g., glass of milk, ice cream) | 9,000 FCC units or more | Typically 3 or more capsules/tablets. |
Best Time to Take
Must be taken just before the first bite or sip of dairy-containing food or drink.
With or Without Food
Yes, must be taken with dairy-containing food.
Forms & Bioavailability
| Form | Absorption | Best For | Notes |
|---|---|---|---|
| Capsules/Caplets | High | Swallowing with the first bite of food. | The most common form. |
| Chewable Tablets | High | Convenience, no water needed. | Often flavored and suitable for children. |
| Liquid Drops | High | Adding directly to liquid dairy products. | Can be added to a carton of milk to pre-digest the lactose. |
Side Effects & Safety
Common
- Virtually none. Lactase supplements are considered very safe.
Rare
- Allergic reaction to other ingredients in the supplement (e.g., fillers, binders).
Contraindications
- Individuals with a milk allergy (an immune reaction to milk protein) will not be helped by lactase supplements.
Interactions
Lactase is an enzyme that works locally in the digestive system and is not known to have any significant drug or supplement interactions.
Scientific Research
Lactase insufficiency
Lactase non-persistence (lactose intolerance) is a common condition worldwide. Exogenous lactase supplements are an effective and safe way to manage symptoms.
Efficacy of exogenous lactase for lactose intolerance: a systematic review and meta-analysis
The use of lactase supplements significantly reduces symptoms of lactose intolerance compared to placebo.
Food Sources
Products With Lactase
4 products in our database contain this ingredient
Frequently Asked Questions
Medical Disclaimer
This content is for educational and informational purposes only and is not intended as medical advice. Always consult with a qualified healthcare professional before starting any supplement regimen, especially if you have pre-existing health conditions or are taking medications. The statements on this page have not been evaluated by the Food and Drug Administration.