Lactase: benefits by goal, the dosage that worked, and the supplements ranked
What the 11 human studies of lactase we graded show for each goal, the dose that worked, and the products that hold it. This page is educational, not medical advice.
Lactase benefits, by goal: what the studies show
Members OnlyThe top 1 of 1 goals
| Goal | What the studies show | Studies | Dose that worked |
|---|---|---|---|
| After-Meal Comfort: Fast Relief | Too few studies 11 studies, 4 showed an improvement, 1 found none | 11 | 6,000 IU |
Lactase supplements, ranked by the human studies
Members OnlyNone in our catalog yet
No product in our catalog holds it at a dose that counts yet.
Lactase dosage: how much per day
The dose that worked in the studies, and the upper limit
The studies taken by mouth that showed an improvement gave 6,000 to 9,900 IU a day.
Biohacker panel
Members OnlyWhat our 10 biohackers say about lactase
Dave Asprey, 25 Dec 2025: Recommends leaving Santa some enzyme support from MassZymes because 70% of adults lack the enzyme lactase to properly digest dairy. Source
Ben Greenfield, 20 Nov 2024: Discusses how the lactase enzyme might affect digestion. Source
Dr. Eric Berg, 29 Jun 2024: Explains that lactase is an enzyme that helps break down milk sugar (lactose) and is destroyed during pasteurization, but is present in raw dairy. Source
Peter Attia, 31 Oct 2023: Explains that people take lactase milk because if they don't have the lactase enzyme, they can't break down lactose sugar in milk, leading to food sensitivity symptoms. Source
Dr. Mark Hyman, 26 Mar 2022: Recommends taking a lactase enzyme replacement with a meal if you have lactose intolerance and want to consume dairy or accidentally ingest it. Source
Thomas DeLauer, 15 Jun 2018: Notes that people with lactose intolerance can usually take a lactase enzyme to help break down lactose, but this may warrant further investigation into the body's overall ability to break down milk. Source
Questions people ask
Members OnlyAnswered from the figures on this page
How much lactase per day?
The studies taken by mouth that showed an improvement used 6,000 to 9,900 IU a day.
Can I take lactase with my meds?
Some supplements can change how meds work or are absorbed. Members have every product checked against the meds in their Health Profile before it joins their protocol.
Educational, not medical advice. Figures come from the human studies on PubMed we have graded; a study counts for a form when it names the form it used. Updated as new studies arrive. How we grade →
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