Written by the Plenthera team (orthomolecularly trained). Scientifically reviewed in April 2026. Last updated: April 30, 2026.
Lactase is the enzyme that breaks down milk sugar (lactose) — and in the case of lactose intolerance, it's precisely the enzyme the body doesn't produce enough of. At Plenthera, you'll find lactase in tablet and drop form in standard 3,000-9,000 FCC units, for those who want to enjoy dairy without the consequences.
Which lactase is right for you?
| Form | FCC | Best for |
|---|---|---|
| Tablets 9000 FCC | High | Heavy dairy, severe intolerance |
| Tablets 3000-5000 FCC | Standard | Light dairy, mild intolerance |
| Drops | Variable | Children, milk pre-treatment |
What is lactase?
Lactase (β-galactosidase) is an enzyme that breaks down lactose — the sugar in milk and dairy — into glucose and galactose. In lactose intolerance, the body does not produce enough of its own lactase, causing undigested lactose to enter the large intestine and be fermented there by intestinal flora — resulting in bloating, gas, and diarrhea.
Globally, a large proportion of adults lose the ability to produce sufficient lactase after childhood — an evolutionary process that is normal for mammals. In the Netherlands and Northern Europe, through centuries of dairy consumption, genetic "lactase persistence" has developed in about 75% of the population. For the remaining 25% and for people from other regions (Asian, African, Mediterranean): lactose intolerance is common.
Lactase supplements are a direct solution. By taking a tablet or drops 5-15 minutes before dairy intake, you provide extra lactase to the intestine — enough to break down the lactose in milk, cheese, ice cream, or cream. Effective for those who want to occasionally eat dairy without consequences. Dosage: 3,000-9,000 FCC units, higher for heavy dairy meals.
Also check out our digestive enzymes category for broad enzyme complexes and our probiotics category for the flora component.
Science and EFSA status
Lactase for lactose digestion is well-documented scientifically. Its action is clear: the enzyme splits lactose into glucose and galactose, which the body can absorb. Supplementation is effective for people with lactose intolerance.
EFSA has not recognized a specific health claim for lactase, but its function is scientifically undisputed. We therefore only describe the mechanism without literal claims of efficacy.
The lactase forms at Plenthera
Lactase tablets 9000 FCC
High dosage — for heavy dairy meals or severe intolerance. 1 tablet just before dairy.
Lactase tablets 3000-5000 FCC
Standard dosage — for light dairy or mild intolerance.
Lactase drops
For those who cannot swallow tablets or for children. Drops in milk before drinking — works overnight in the refrigerator.
How to use lactase?
Simple basic approach for lactase:
- Take one tablet 5-15 minutes before dairy intake.
- For heavy dairy meals: higher FCC dosage (9000+).
- Drops in cold milk: 5-10 drops, stir and refrigerate for 24 hours — lactose is then already broken down before intake.
- For children: drop route is more practical.
- Combine with probiotics for those who also want flora research — check out our probiotics category.
Myths and misconceptions about lactase
Myth 1: "Being lactose intolerant means I can never eat dairy."
Incorrect. With lactase supplementation, you can tolerate dairy perfectly well. Many people choose to occasionally consume dairy with lactase supplementation.
Myth 2: "Yogurt always needs lactase."
Often not — yogurt cultures (probiotics) already break down part of the lactose during fermentation. Many lactose-intolerant individuals tolerate yogurt without supplementation.
Myth 3: "Higher FCC is always better."
Not automatically. 3,000 FCC is sufficient for light dairy. Higher FCC for heavy meals — not necessary for a glass of milk.
Myth 4: "Lactase also works after the meal."
Works best 5-15 minutes before dairy. After the meal, lactose is already partially fermented — less effective.
Combining lactase with other supplements
Lactase is often combined for broad digestion. Commonly chosen combinations:
- Digestive enzyme complex: for those who want to support the digestion of other foods besides lactose. Check out our digestive enzymes category.
- Probiotics: yogurt bacteria also partially digest lactose. Check out our probiotics category.
- Calcium: for those who restrict dairy, calcium supplementation may be logical. Check out our calcium category.
- Vitamin D: for calcium absorption with limited dairy. Check out our vitamin D category.
Frequently asked questions
What is lactase?
Enzyme that breaks down lactose into glucose and galactose.
How does lactase work for lactose intolerance?
Replaces the enzyme the body doesn't produce enough of — lactose is broken down before it ferments in the large intestine.
When to take lactase?
5-15 minutes before dairy intake.
How much lactase per day?
Per dairy serving 3,000-9,000 FCC. No daily maintenance dosage.
Lactase drops or tablets?
Tablets: practical on the go. Drops: for children or milk pre-treatment.
Which FCC dosage?
Glass of milk: 3,000-5,000 FCC. Pizza or heavy dairy: 9,000+ FCC.
Vegan lactase?
Yes — microbially produced from Aspergillus oryzae or Kluyveromyces lactis.
Does lactase have side effects?
Generally well tolerated.
Lactase for children?
Drop formula for children.
Difference between lactase and Lactaid?
Lactaid is an American brand. Lactase is the generic name of the enzyme.
Sources
- EFSA Regulation (EU) 432/2012 — no overarching enzyme claims; individual claims limited.
- Roxas M., "The role of enzyme supplementation in digestive disorders", Altern Med Rev (2008).
- EFSA — Scientific Opinions on enzyme claims (mostly rejected or not evaluated).
- Suarez F. et al., "Lactose maldigestion is not an impediment to the consumption of milk", Am J Clin Nutr (1998).
Disclaimer: This text is for informational purposes only and does not replace medical advice. Lactase is a dietary supplement, not a medicine. In case of doubt or if you are taking medication, we recommend consulting a doctor or orthomolecular therapist first.