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Do I Need a Stronger Lactase Pill?

Lactase, explained

Do I Need a Stronger Lactase Pill?

If your usual lactase pill doesn't seem to cover a big dairy meal anymore, reaching for "extra strength" makes sense. Here's what the numbers on the box mean, what more units can and can't do, and a different, once-daily approach to consider.

How lactase pills work

Lactase is the enzyme that splits lactose, the sugar in milk, into two smaller sugars your body can absorb. About 65% of people have a reduced ability to digest lactose after infancy. [1] A lactase pill supplies the enzyme from outside the body, so it helps with the dairy it meets on the way through, at that meal.

That's why timing matters. Lactaid's directions for its Fast Act caplets say to take them with your first bite or sip of dairy. Taken too early or too late, they won't do their job, and the brand says to take another if the meal lasts more than 30–45 minutes. [2] The enzyme approach has stayed largely the same for decades: you take it with each dairy meal. Always follow the directions on your product's label.

What "FCC" on the label means

Lactase strength is listed in FCC units (Food Chemicals Codex), a measure of enzyme activity. For example, Lactaid lists 9,000 FCC lactase units per Fast Act caplet. [2] Research papers often report the dose in "IU" or "units" instead, so the study numbers below are quoted exactly as each paper reports them.

Why people reach for "extra strength"

  • The meal got bigger. A glass of milk has about 12 g of lactose, and a pizza slice has well under 1 g. Portions add up. (See how much lactose is in that.) [3]
  • The meal got longer. A lactase dose is tied to a meal, and the brand directions call for another one if the meal runs past 30–45 minutes. [2]
  • Timing slipped. Taking it too early or too late is one of the ways it misses. [2]

What more units can do, and what they can't

More enzyme can digest more lactose, up to a point. In a randomized, double-blind study, lactose maldigesters drank milk containing 20 g of lactose with lactase from three brands. About 6,000 units reduced total breath hydrogen (a marker of undigested lactose) significantly more than about 3,000 units, and symptoms were less severe with every enzyme product. The researchers also found the chewable, caplet and soft-gel forms worked about the same when the units were equal. [4]

A big enough lactose load can still overwhelm it. In the same study, with 50 g of lactose, neither 3,000 nor 6,000 units made a significant difference to breath hydrogen or symptoms. The authors wrote that the 50 g dose "appeared to overwhelm" both. [4]

Response varies from person to person. In a 2014 study, 96 people with lactose malabsorption took 15,000 units of lactase before 25 g of lactose. The breath test turned negative for about 22% of them and improved for about 18%. For the other 60%, hydrogen levels stayed about the same as without the enzyme. [5]

The bottom line: a higher-unit pill can help for a bigger serving, and it still works the same way. You take it with each dairy meal, on time, every time.

The other option: once a day, not once a meal

Holy Cow! takes a different approach. It's a once-daily probiotic + prebiotic designed to support lactose digestion.* Each capsule has a 16 billion CFU probiotic blend, including B. adolescentis, with XOS and D-ribose. [7] Instead of timing a pill to each meal, you take one capsule in the morning.

What the research found

65% lower combined daily symptom scores with the studied strain versus placebo over two weeks.*

Randomized, double-blind, placebo-controlled pilot study of 21 lactose maldigesters (Ramakrishnan et al., 2025). [6] The study tested the strain, not the finished Holy Cow! product.

One capsule a day to support lactose digestion*

Holy Cow! is a once-daily probiotic + prebiotic. Take once daily in the morning, ideally on an empty stomach, with water. Keep your regular lactase routine for the first 21 days. We recommend continued daily use for best results.

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FAQ

Do lactase pills work if I take them after eating?

Lactaid's directions for its Fast Act caplets say to take them with your first bite or sip of dairy. Taken too early or too late, they won't do their job, and the brand says to take another if the meal lasts more than 30–45 minutes. Always follow the directions on your product's label.

Is a higher FCC number always better?

Not by itself. In a 1993 study, about 6,000 units reduced breath hydrogen more than about 3,000 units with 20 g of lactose, but neither dose made a significant difference against 50 g of lactose. More units can help up to a point, and the size of the dairy serving still matters.

Why do some people still feel symptoms with a lactase pill?

Response varies. In a 2014 study of 96 people with lactose malabsorption, a 15,000-unit dose cleared the breath test for about 22% and lowered it for about 18%, while about 60% saw little change in breath hydrogen.

What is the once-daily alternative?

Holy Cow! is a once-daily probiotic + prebiotic designed to support lactose digestion.* You take one capsule in the morning instead of timing a pill to each dairy meal. Keep your regular lactase routine for the first 21 days.

Can I use Holy Cow! and a lactase pill together?

Yes. We recommend keeping your regular lactase routine for the first 21 days while you take Holy Cow! daily.

Is lactose intolerance the same as a milk allergy?

No. A milk allergy is an immune reaction to milk proteins. Neither lactase pills nor Holy Cow! are meant for milk allergy. Talk to your doctor if you think you have one.

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Sources

  1. MedlinePlus Genetics. Lactose intolerance. U.S. National Library of Medicine. medlineplus.gov
  2. Lactaid. LACTAID® Fast Act Caplets: directions and product information. lactaid.com
  3. U.S. Department of Agriculture. FoodData Central: Milk, whole, 3.25% (FDC 746782) and cheese pizza, regular crust (FDC 173292). fdc.nal.usda.gov
  4. Lin MY, DiPalma JA, Martini MC, Gross CJ, Harlander SK, Savaiano DA. Comparative effects of exogenous lactase (beta-galactosidase) preparations on in vivo lactose digestion. Dig Dis Sci. 1993;38(11):2022–2027. PMID 8223076
  5. Ibba I, Gilli A, Boi MF, Usai P. Effects of exogenous lactase administration on hydrogen breath excretion and intestinal symptoms in patients presenting lactose malabsorption and intolerance. Biomed Res Int. 2014;2014:680196. PMC4055537
  6. Ramakrishnan M, et al. Gut Microbes Reports. 2025. doi:10.1080/29933935.2025.2508199. PMC12940102
  7. Holy Cow! The science behind Holy Cow! getholycow.com/pages/science

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

This page is general information, not medical advice. Lactose intolerance is not the same as a milk allergy; if you have a milk allergy, talk to your doctor. Lactaid® is a registered trademark of its owner. Holy Cow! is not affiliated with, endorsed by, or sponsored by Lactaid or its owner. Other brand names mentioned in cited studies belong to their respective owners.