specialist in digestive health since 2008

specialist in digestive health since 2008

Since 2008, we’ve dedicated ourselves to crafting nutritional supplements. Our team of dieticians meticulously develops our products with exceptional care. We prioritize purity, using only essential ingredients in our formulations. This guarantees our supplements are gluten-free, soy-free, and of superior quality, ensuring safety and minimizing unwanted side effects.

Monash University low FODMAP certified™

Monash University low FODMAP certified™

Select products have been proudly Monash University Low FODMAP Certified™

more than 100,000 satisfied customers

more than 100,000 satisfied customers

Since 2008, our mission has been to “help everyone enjoy their food again.” We are proud to have supported over 100,000 customers.

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Suffering from lactose intolerance?

Trouble digesting lactose?

Enjoy dairy again with Intoleran Lactase!

Intoleran Lactase 20,000 is our strongest enzyme supplement, specially formulated to act-fast and help reduce occasional gas, bloating, and discomfort associated with digesting dairy.*

Thanks to the high dosage of 20,000 FCC-units lactase enzyme in each serving size, the tablets are highly effective. Ideal when you are very sensitive to lactose or when consuming larger amounts of lactose.

Helps reduce gas and bloating associated with digesting dairy*

Highest dosed lactase tablet for the entire meal

Easy to break tablet

Vegan, dairy, gluten and soy free

Low FODMAP Certified™ and Based on scientific research

Affordable and available over the counter

Start enjoying dairy products again in just three simple steps

Step 1.

Shop your desired supplements at intoleran. The supplements will be on your doorstep in 2 – 5 days.

Step 2.

We offer Free Shipping over $10! We ship our products throughout the US free of charge for orders of $10 or more. Below $10 we charge $5.50

Step 3.

Experience what Starchway can do for you and enjoy your favorite meals again!
Join the 100.000 happy customers we’ve supported.
No effect money back


Trusted by more than 100.000 happy customers and professional dietitians worldwide

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4.58 – Excellent
View all reviews
30/03/2026
I can’t function without it!
I can’t function without it! Truly a most supportive tool. Just wish my product was consistently in stock!
Verified review
30/03/2026
I’m extremely happy with your product.
I’m extremely happy with your product.
Verified review
29/03/2026
Can’t always afford to subscribe for…
Can’t always afford to subscribe for the discount. Some months we are tight so we have to wait until we can afford more. Wish it wasn’t so very expensive.
Verified review
29/03/2026
Taking it once daily.
Taking it once daily.
Verified review
28/03/2026
Beginnings
Just starting the product but seems to work. Fast delivery.
Verified review
26/03/2026
“Fructase” is not widely available in…
“Fructase” is not widely available in the US and it’s expensive for how many you need to take to eat one serving of fructose. I have found other digestive supplements but they use corn and I have a corn allergy. I’d still love to see the cost go down, but it’s a super great product especially if you only have to take one or two caps. I’ve already recommended the brand to other friends.
Verified review
25/03/2026
Great product
Great product. I haven’t had any issues on it. It’s a little pricey though
Verified review
25/03/2026
I just started the product but I was…
I just started the product but I was very happy with the ordering process and quick shipping! It came earlier than expected.
Verified review
19/03/2026
I recently determined I’d become…
I recently determined I’d become lactose intolerant and was getting ready for a trip, and was unsure if lactose free products would be available. You helped me with a very speedy delivery! …. And it’s WORKING 😉 thank you
Verified review
17/03/2026
Works fairly well on starch
Works fairly well on starch….not as well sugar…at least not for me.
Verified review
16/03/2026
this has helped my son feel normal…
this has helped my son feel normal again and not living in constant screaming pain!
Verified review
16/03/2026
Your test kits were extremely helpful…
Your test kits were extremely helpful while trying to resolve my sucrose intolerance.
Verified review
13/03/2026
I have IBS so now I’m able to eat my…
I have IBS so now I’m able to eat my favorite foods in moderation
Verified review
12/03/2026
No proper seal of product.
The box was ripped, and it looks like someone may have opened it. There was no seal on the bottle lid, which made me concerned about the safety of the product. I emailed the company but no solution yet.
Verified review
08/03/2026
My gut is definitely able to process…
My gut is definitely able to process certain FODMAPs much better when I take the Intoleran supplement when eating them. I wish I knew about this sooner!
Verified review
02/03/2026
received in record time
received in record time
Verified review
28/02/2026
The Starchway pills do help digest…
The Starchway pills do help digest sucrose, but it can take 2-4 of them and sometimes my stomach hurts after. Overall, I’m glad to have the product handy for social occasions when it’s hard to get away from the sugar.
Verified review
27/02/2026
Seems like it just delayed the stomach…
Seems like it just delayed the stomach pains and diarrhea.
Verified review
27/02/2026
It seems to work well for me but it…
It seems to work well for me but it needs to be more affordable.
Verified review
26/02/2026
Starchway Works
Starchway has been a huge help to my digestion.
Verified review
26/02/2026
I love the lactase drops
I love the lactase drops! they let me treat my own milk, so I’m back to buying my milk from the local dairy instead of some big corporation. Trying the news capsule for fodmaps and very excited and hoping for good results!
Verified review
25/02/2026
Product is a game changer for me
Product is a game changer for me. I’m enjoying the faster delivery process as well.
Verified review
25/02/2026
I like that we can get shipmentments…
I like that we can get shipmentments faster. I would like to be able to have subscription process easier.
Verified review
22/02/2026
So far everything has been great
So far everything has been great. No irrigation to my stomach so far I feel great.
Verified review
21/02/2026
Sometimes the product is excellent and…
Sometimes the product is excellent and sometimes it doesn’t work at all. Are there quality control issues where some batches are not effective?
Verified review
18/02/2026
I felt nauseous the next day
I felt nauseous the next day. I’ve only used it once. I’ll try one more time to be sure that it wasn’t something else. It did help with the congestion and other symptoms I get from histamines.
Verified review
17/02/2026
The product was very good and…
The product was very good and effective. However, for the second time I had a delivery problem. One of your carriers (OnTrack) contacted me on two different orders that they could not deliver due to incomplete address. I tried to contact them but was unable to do so. In any event, on both occasions, the packages were delivered about a week late with no further address information from me. Further, upon receipt of both orders I noticed that the delivery address indicated on the packages was perfect. Suggest you review these situations with OnTrac.
Verified review
17/02/2026
Good customer service
Good customer service. I would like lower prices!
Verified review
17/02/2026
DAO Mini is not strong enough
DAO Mini is not strong enough. I need to take a lot of them for it to work.
Verified review
13/02/2026
Life changing!
Life changing!
Verified review
12/02/2026
Great product
Great product, works well! Wish it was a little cheaper as I have to use it for medical reasons with most meals, so it gets expensive fast! But it’s super helpful!
Verified review
11/02/2026
Just simply too expensive
Just simply too expensive
Verified review
11/02/2026
Easy to order.
Easy to order.
Verified review
09/02/2026
I can have fruit again!
just had my first apple in over 15 years no symptoms!
Verified review
06/02/2026
I am so pleased with Itoleran and the…
I am so pleased with Itoleran and the people that supply it!! It works perfectly for me. I have ordered the Lactose formula but the regular works so well-I will probably use one or the other at times. I am so pleased to be able to have it sent so promptly! Thank you for how well you run your company. I am so grateful. Ann Sand
Verified review
06/02/2026
Bad customer service and ordering…
Bad customer service and ordering ability
Verified review
05/02/2026
It helps me handle my stomach
It helps me handle my stomach issues
Verified review
04/02/2026
i added 20 drops into one gallon milk
i added 20 drops into one gallon milk, waited for over 48 hours, i still have stomach gas as usual
Verified review
30/01/2026
So far it works well
So far it works well
Verified review
29/01/2026
Good service
Good service, good products.
Verified review
23/01/2026
Havent taken it long but felt better…
Havent taken it long but felt better after first dose. Im hopeful.
Verified review
22/01/2026
Seems to be working good for me in…
Seems to be working good for me in addition to Sugraid. I just wish my insurance would pay for it as it is so expensive.
Verified review
20/01/2026
My gastroenterologist recommended…
My gastroenterologist recommended Starchway. It has helped a great deal!
Verified review
19/01/2026
The Intoleran is helping me with my…
The Intoleran is helping me with my issues with lactose intolerance. I’m still a little afraid to eat or drink dairy products, but so far, so good. I’ve talked to several of my friends about Intoleran. One of my friends has tried it and says that it works well for her. So, I order for her too😊
Verified review
19/01/2026
Works Great & Love the Dispenser
I have histamine intolerance and use the Intoleran Mini version of DAO when I stray from my usual strict low-histamine diet. It works better than other types and brands I’ve tried. No side effects. Works quick (I usually take it just 5 minutes before eating). On top of that, I LOVE the dispenser it comes in.
Verified review
18/01/2026
Once in the morning is good
Once in the morning is good, might still need lactose pill for evening meal.
Verified review
18/01/2026
Wonderful Product
It allows me to eat a wide variety of foods without side effects. It deals with the Fructose and Fructans that don’t like me.
Verified review
17/01/2026
I was so pleased to get my order in 2…
I was so pleased to get my order in 2 days! I have been using the regular Intoleran with good results. I have a little over a month of that left and will go with Intoleran Lactose after that. Thank you so much for a product that works and is available!!
Verified review
15/01/2026
I’m able to eat starchy foods without…
I’m able to eat starchy foods without bloating or causing an onset if SIBO. Yay!!!
Verified review
14/01/2026
works!
works!
Verified review

100-Day Satisfaction Guarantee!

We believe in our product, and we want you to as well. Try Lactase 20,000 risk-free for 100 days. If you still get bloated after the intake of starch or sucrose and you’re not fully satisfied, we’ll give you a full refund—no questions asked.


Why Intoleran

Expert since 2008

Since 2008, we’ve dedicated ourselves to crafting nutritional supplements. Our team of dieticians meticulously develops our products with exceptional care

Pure ingredients

Crafted from pure, natural ingredients, our blend ensures everyone can enjoy the benefits of Lactase 20,000

Science-based

Healthcare professionals and dietitians support our scientifically-backed solution.

lactose intolerant betekenis

What is lactose?

Lactose is a specific type of sugar found in milk and other dairy products. The enzyme lactase breaks down lactose into glucose and galactose, allowing the intestinal wall to absorb it. If there is insufficient lactase enzyme present, lactose cannot be broken down and absorbed in the small intestine.

Intoleran products contain the digestive enzyme lactase, which aids in the digestion of lactose, reducing the risk of associated complaints.

Watch our video on lactose intolerance!

Discover the power of lactase enzymes

Are you done skipping all the delicious foods containing dairy?

Lactase 20.000 is specially formulated with the digestive enzyme Lactase, designed to help with the digestion of Lactose and dairy. It Helps reduce occasional gas, bloating, and discomfort associated with lactose intolerance.


Shop our popular lactase supplements

Lactase Drops

Lactase Drops

0.47 fl oz (14 ml)
  • Helps reduce gas and bloating associated with digesting dairy*
  • Contains the liquid Lactase enzyme, baby safe!
  • Lactose-free cooking and baking
  • Lactose (milk sugar) is primarily found in milk, cheese and other dairy products
Lactase 20,000

Lactase 20,000

50 Scored Tablets
  • Helps reduce gas and bloating associated with digesting dairy*
  • Highest dosed Lactase tablet for lactose intolerance
  • Lactose (milk sugar) is primarily found in milk, cheese and other dairy products
  • Low FODMAP-certified, vegan, dairy, gluten and soy free
lactase

Once a Day

30 Capsules
  • Helps reduce gas and bloating associated with digesting dairy*
  • Contains probiotics that actively produce the lactase enzyme in the gut*
  • One capsule a day for 24/7 relief!
  • Lactose (milk sugar) is primarily found in milk, cheese and other dairy products
Lactase 10,000

Lactase 10,000

36 Capsules
  • Helps reduce gas and bloating associated with digesting dairy*
  • Highest dosed Lactase capsule for lactose intolerance
  • Lactose (milk sugar) is primarily found in milk, cheese and other dairy products
  • Low FODMAP-certified, vegan, dairy, gluten and soy free
Lactase 2500

Lactase 2500

Dispenser 100 Tablets
  • Helps reduce gas and bloating associated with digesting dairy*
  • Small tablet for mild lactose intolerance
  • Easy to swallow, ideal for children
  • Lactose (milk sugar) is primarily found in milk, cheese and other dairy products

*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.

decrease bloating

Free advice from our dietitians

Digestive complaints? Let us help you, like we’ve helped many others. We will help you to find the solution that fits your needs best.

Fill out our contact form and we will get back to you

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