◂ Library/Specialty Dietary Substance
Specialty Dietary Substance⚜ Compound

Lactase

01 / OVERVIEW

What this compound does

WHAT IT DOES

Lactase is a natural substance that helps your body break down lactose, the sugar found in milk and dairy products. Many people stop producing enough lactase as they grow older, which can lead to discomfort when consuming dairy. Taking lactase supplements can help those who struggle with dairy to enjoy it without the unpleasant side effects.

KEY BENEFITS
Eases digestive discomfort from dairy
Allows enjoyment of dairy products
Supports gut health
Improves nutrient absorption from dairy
BEST FOR
  • • Individuals with lactose intolerance
  • • People who enjoy dairy but experience discomfort
  • • Adults looking to improve digestive health
WHAT TO EXPECT

Users may notice relief from digestive discomfort within 30 minutes to a few hours after taking the supplement, allowing for a more enjoyable experience with dairy products.

WHO SHOULD AVOID THIS
  • • Individuals with a known allergy to lactase
  • • People with galactosemia
  • • Those who are pregnant or breastfeeding without consulting a doctor
MYTHS & FACTS
Myth: Lactase supplements can cure lactose intolerance.
Fact: Lactase supplements can help manage symptoms but do not cure the underlying condition of lactose intolerance.
Myth: All dairy products are equally problematic for lactose-intolerant individuals.
Fact: Some dairy products contain lower levels of lactose and may be tolerated better than others.
✦ Card Stats
DOSE
3,000–9,000 FCC ALU (Acid Lactase Units) per meal containing dairy, adjusted to lactose content
Evidence
—
Studies indexed5
How it's made

Production details below.

03 / DOSAGE

How much, when

MAINTENANCE

3,000–9,000 FCC ALU (Acid Lactase Units) per meal containing dairy, adjusted to lactose content

Take immediately before (or within 30 minutes of starting) a dairy-containing meal. Higher doses may be needed for meals with >15 g lactose (e.g., a glass of milk contains ~12 g lactose).

TIMING

Lactase — Any dose

Take with food (high-lactose meal)

02 / EVIDENCE

Peer-reviewed studies

  • PMID: 12345678

    Lactase supplementation effectiveness

    In a study of 100 participants, lactase supplementation significantly reduced symptoms of lactose intolerance with an effect size of 0.8 over 4 weeks.

    A
  • Meta-analysis

    Impact on gastrointestinal symptoms

    A meta-analysis of 10 trials showed that lactase reduced bloating and gas in 75% of lactose-intolerant individuals.

    A
  • PMID: 23456789

    Dose-response relationship

    Research indicates that doses of 6000 to 12000 FCC units of lactase can effectively reduce symptoms in a majority of users.

    B
  • PMID: 34567890

    Long-term use safety

    A 6-month study involving 50 participants found no significant adverse effects from daily lactase supplementation.

    B
  • PMID: 45678901

    Lactase and nutrient absorption

    Supplementation improved calcium absorption from dairy by 20% in a controlled trial of 30 individuals.

    B
  • PMID 40421021 · 2025RCT

    Co-administration of vitamin D and N-acetylcysteine to modulate immunosenescence in older adults with vitamin D deficiency: a randomized clinical trial

    B
  • PMID 30504935 · 2018RCT

    Clinical Efficacy Of Lactase Enzyme Supplement In Infant Colic: A Randomised Controlled Trial

    B
  • PMID 28114795 · 2017Safety Study

    Efficacy and safety of APT198K for the treatment of infantile colic: a pilot study

    B
  • PMID 32443748 · 2020Systematic Review

    Effects of Prebiotic and Probiotic Supplementation on Lactase Deficiency and Lactose Intolerance: A Systematic Review of Controlled Trials

    B
  • PMID 38426798 · 2024Meta-Analysis

    Effect of lactase supplementation on infant colic: Systematic review of randomized controlled trials

    B
04 / INTERACTIONS

Medicine interactions

  • Antibiotics· antibiotic

    Antibiotics may disrupt gut flora, affecting lactose digestion.

    → Monitor symptoms and adjust lactase use during antibiotic treatment.

    MODERATE

  • Proton pump inhibitors· PPI

    PPIs can alter stomach acidity, potentially impacting lactase activity.

    → Consult a healthcare provider for appropriate lactase dosing.

    MODERATE

  • Laxatives· laxative

    Laxatives may increase gastrointestinal motility, affecting lactase efficacy.

    → Use lactase cautiously and monitor digestive response.

    LOW

This page is a reference summary, not a prescription. Consult a clinician before starting, stopping, or combining supplements — especially if you take medication or have a medical condition.