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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About Intoleran

About Intoleran – Digestive Experts

Intoleran is a Dutch company focused on developing a wide range of dietary supplements that support digestion. Our mission is to help everyone to enjoy food again!

The story began in 2008 with founder Remko Hiemstra. Remko, who is lactose intolerant himself, saw that there was still much to be gained in the field of lactose intolerance. Driven by this, he started developing a supplement that aids in the digestion of lactose in food. In the years that followed, a broad range of dietary supplements was developed to support people with various digestive issues.

As of 2024, we sell our wide assortment of successful and highly appreciated products worldwide. A growing group of consumers, in Europe, the United States, Australia, and beyond, benefits from digestive support, allowing them to enjoy their favorite foods!

Take a look at our headquarters in Nieuwegein!

Culture & Brand values
Our culture and brand values describe who we are, what we stand for, how we interact with each other and our customers, and guide everything we do and decide.

The adherence to our culture and brand values is particularly evident in product development, where everything is based on a scientifically grounded foundation. The production process, in which the quality and purity of our products are central. Our team of dietitians is always ready to support both our clients and healthcare professionals with practical advice, explanations, and full training on our products. And in how we approach things: down-to-earth, pragmatic, and with a “go do it” mindset!

We enjoy to help you
Helping you and each other makes us happy. We understand how frustrating digestive problems can be, which is why we take the time to really listen to you and offer honest advice. We are happy to go the extra mile to truly help you because it’s important to us that you can experience a healthy and balanced digestion.

Act from expertise
Our expertise in digestion is the foundation of everything we do at Intoleran. Thanks to our knowledge, we can develop products based on scientific research, providing the best possible support. Our team of specialized dietitians is happy to share this knowledge with you.

Keep it simple & honest
At Intoleran, we keep things simple and honest. This applies to how we work, how we communicate, and especially to our products. We offer you exactly what you need: honest products with only the essential ingredients and no unnecessary additives.

Go do it
We are excited about the future and are not afraid to make decisions that have an impact. We enjoy improving something every day, no matter how small, and we love making a difference in the lives of our customers. Together with our team and our customers, we strive for success, day after day.

Meet the team

Our dedicated team is passionate about working toward innovative solutions so you can enjoy food stress-free.

Anouk

Consulting dietician

Iris

Consulting dietician

Mare

Consulting dietician

Rosanne

Consulting dietician

Melissa

Customer service & Administration

Daniëlle

Financial administration

Meltem

CRM & Social media manager

Alexander

Supply chain manager

Tal

Digital marketer

Remona

Warehouse employee

Sander

Warehouse employee

Ruben

E-commerce & Digital marketing manager

Bouke

Director finance & operations

Harmen

Managing director

Trusted by over 100,000 satisfied customers and dietitians worldwide!

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4.58 – Excellent
View all reviews
30/12/2025
Notice to difference in one week
Notice to difference in one week. No more issues eating the foods I love.
Verified review
29/12/2025
The product is great
The product is great. My grandchildren take the lactose pills and they are very effective. Ordering is easy. Any questions I have had have been answered promptly and completely.
Verified review
29/12/2025
You sent me the wrong product that I…
You sent me the wrong product that I paid for. Why bother paying money and wasting time for a product that I didnt order? I ordered Starches and sucrose and received ONCE a DAY for DAIRY..
Verified review
29/12/2025
waiting until after the holidays to try…
waiting until after the holidays to try intoleran
Verified review
29/12/2025
It takes too long for the order to get…
It takes too long for the order to get mailed. The product is good.
Verified review
29/12/2025
I can enjoy my favorites again!
I have to admit, I didn’t think this would work, but the product delivered more than I could have hoped
Verified review
27/12/2025
Tried it and it did nothing to help…
Tried it and it did nothing to help with gas.
Verified review
27/12/2025
I had trouble ordering directly from…
I had trouble ordering directly from the company in the past so I then went through a well-known vendor. This past time everything went smoothly.
Verified review
26/12/2025
Fast shipping & seems to help
Product seems to help! It’s only been a few meals but it already seems more effective than enzyme blends from other companies that I’d tried in the past. Haven’t noticed any negative effects. My order shipped quickly and arrived in just a few days, which was very helpful.
Verified review
25/12/2025
Very helpful and responsive
Very helpful and responsive
Verified review
25/12/2025
Quick
Quick, accurate delivery.
Verified review
22/12/2025
It’s a capsule
It’s a capsule. Easy to carry with me.
Verified review
22/12/2025
Really seems to be helping me!
Really seems to be helping me!
Verified review
21/12/2025
Great Product
Great service.
Verified review
19/12/2025
I have been using this for at least a…
I have been using this for at least a year if not longer. What a difference it makes. I have many foods I can’t eat because they make me sick. I have started taking this when I go out to eat or people who think they are being careful make my food. I call it my just increase pill. What a difference it has made
Verified review
19/12/2025
Intoleran quatrase has opened up a…
Intoleran quatrase has opened up a world of more varied eating for me that I thought was gone forever. Their lactaid is pure, unlike the popular brand in grocery stores that has FODMAP unfriendly additives.
Verified review
19/12/2025
I like that you have the samples
I like that you have the samples. That’s how I was able to try them without spending tons. Also just gave samples pack to my adult son, easier than loose pills.
Verified review
18/12/2025
Very helpful for those of us that have…
Very helpful for those of us that have enzyme deficiency.
Verified review
18/12/2025
Quatrase 10,000 is amazing
Quatrase 10,000 is the only single digestive aid that allows me to eat foods that I normally would have to avoid due to multiple food intolerances. Taking a single pill(s) for multiple issues reduces stress when full ingredient lists are not provided.
Verified review
18/12/2025
I like that it is in mini tabs so I can…
I like that it is in mini tabs so I can titrate according to my needs for a particular meal. Wish it was more affordable, but that applies to all brands of dao.
Verified review
17/12/2025
Good product
Good product, good response from questions and good company overall
Verified review
15/12/2025
I take one each morning when I indulge…
I take one each morning when I indulge in espresso shots with full fat cream! I am so blessed to be able to enjoy coffee with cream, and Intoleran makes this possible!
Verified review
11/12/2025
Intoleran works as described
Intoleran works as described. I don’t need to say more. My only critic is that shipping takes forever!!! I would like faster methods for a choice.
Verified review
11/12/2025
>I was so
I was really looking forward to eating more diverse meals again and was disappointed that the enzymes didn’t work. I tried eating pizza and got a stomach ache and acid reflux shortly afterwards. I tried using the enzymes again, as directed at a Christmas party, felt bloated and had a stomach ache afterwards and was constipated the next morning.
Verified review
07/12/2025
Digestive enzymes have helped me with…
Digestive enzymes have helped me with food intolerances but the price is very steep.
Verified review
06/12/2025
The shipping time is so long
The shipping time is so long. It took much longer than anticipated to receive.
Verified review
05/12/2025
Intoleran is Terrific
Intoleran’s Starchway product has improved the quality of my life tremendously. Also, the company is responsive to customer concerns and their product fulfillment is fast and easy.
Verified review
05/12/2025
Good products
Good products, fair prices, quick shipping.
Verified review
03/12/2025
I can’t review something I have not…
I can’t review something I have not received yet! (I gave it a one to try to get your attention.)
Verified review
02/12/2025
Strong Customer Service
Each question I emailed was answered thoroughly, which means it was really read and not skimmed. I appreciate this.
Verified review
02/12/2025
Intoleran has always been very responsive.
Intoleran has always been very responsive and ongoing development has led to new products that have really helped members of my family. We have had great success with Starchway and Carbostarch for sugar digestion problems.
Verified review
01/12/2025
It’s very hard to select your products…
It’s very hard to select your products because you don’t see each helps with very clearly. This leads to a lot of trial and error.
Verified review
30/11/2025
It seems to eliminate all difficulties…
It seems to eliminate all difficulties associated with onion for me.
Verified review
30/11/2025
Easy coverage
Easy coverage. Taking one tiny capsule instead of a product you have to sprinkle on your food is great!
Verified review
30/11/2025
Fine products, but big delivery issue.
My order was correct, however, it was sent to the wrong address far away. I had to drive myself to a different city to retrieve it. It was a little nerve racking knocking on someone’s door in the dark. There’s really no reachable customer support and thats why I had to take matters into my own hands. I like the products a lot. They work, but I hope I don’t have to experience that again.
Verified review
27/11/2025
I am using 2 of the enzymes
I am using 2 of the enzymes, one for starch such as potatoes and pastas, and another one for fruits. Both have been working well for me. I have used the starch on for 3 months and the fruit one for a month. Will continue to use both. I have found that two capsules work best for me but I can’t take them together as I get an upset stomach. I decide which I should take by what I am going to eat.
Verified review
25/11/2025
I like that I can get their bigger…
I like that I can get their bigger bottles and they are automatic renewal. I just wish it would be easier if I needed to change the date for the automatic renewal. It’s like I have to do a whole new prescription.
Verified review
24/11/2025
Intoleran is a Very Good Company
The Quatrase 10,000 I received the capsules were not full. I contacted Intoleran and asked me to send a picture which I did and they promptly responded and sending me a new box.
Verified review
22/11/2025
Might work for you, doesn’t work for me
I believe I have sensitivities to most FODMAPS and lactose, so I tried a couple of your sample packs of Quatrase. Given the price, I expected great things but these have a marginal effect, if any—and really no better than the enzymes I’m already taking (at 1/4 the price). I’ve tried 2 capsules with a meal and even that didn’t mitigate the effects all that much.
Verified review
19/11/2025
It works and I’ve been lactose…
It works and I’ve been lactose intolerant for 50 years!!!!!
Verified review
19/11/2025
Love how quick it works
Love how quick it works. Sometimes I find out after I est something that it isn’t low fodmap and it seems like every tome I take intolerance it’s within 20 min that the painful bloat goes away. Anything you can change? Love to have a discount?!
Verified review
19/11/2025
I buy Lactose free milk but…
I buy Lactose free milk, but occasionally, I get a bad carton that actually isn’t lactose free. It often takes me a couple days to realize why I’m not feeling well, but then it dawns on me that everytime I use that milk, it is making me sick. This happened a week ago and Intolerans helped me fix it. Thank goodness!
Verified review
17/11/2025
Product was easy to order and arrived
Product was easy to order and arrived quickly.
Verified review
16/11/2025
I reached out on questions I had on…
I reached out on questions I had on product. They responded very timely with good information. I had ordered the wrong product and now have the correct product on order with you, Quatrase 10,000. I will see if this product works for me. I’m sure hoping.
Verified review
16/11/2025
The DAO product is a game changer
The DAO product is a game changer. I’m slowly starting to eat more foods
Verified review
16/11/2025
DAO – great product !
Great products. I use the DAO, discovered it on the Netherlands while traveling. It works super well to keep histamine reactions away! Really like the little dispensary box and small size of tablets.
Verified review
15/11/2025
The various amounts of pills that can…
The various amounts of pills that can be purchased is nice. The metal containers are wonderful for keeping pills in my purse. The enzyme work well for me- I’ve been able to eat foods I haven’t eaten in a decade! I’m fructose intolerant.
Verified review
14/11/2025
able to ship to p.o.box
able to ship to p.o.box, fast delivery
Verified review
13/11/2025
The product works as expected
The product works as expected. Before knowing your product, I had to buy lactose free milk which was also often fat reduced. Now I have the freedom to choose any milk I like.
Verified review
08/11/2025
Disabled veteran with severe IBS
I am a disabled veteran with severe IBS. After almost 20 years of suffering daily, I finally have peace and digestive stability thanks to intoleran. I have been working with a dietician while I navigate the low Fodmap diet and personalization stage. Doing the elimination diet was a game changer as it gave me brand new information about my intolerances. It turns out, I have an intolerance to almost every kind of Fodmap. Enter intoleran – a literal life saver and mental health super hero. Gone are the days of turning down dinner invitations and social gatherings for fear of a blow out. Now I can even go to restaurants again without needing a week to recover! Thank you for the work you do in this vital medical field. You have changed my life for the better and I couldn’t be more grateful. I told my dietician at the VA all about this product and she was delighted to learn of it. Now even more vets will get the support they deserve.
Verified review
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