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.

low FODMAP Certified™ by the Monash University

low FODMAP Certified™ by the Monash University

Our products proudly hold the Low FODMAP Certified™ status from Monash University

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.

Don’t let bloating and gas ruin your daily life!

Feeling bloated, constipated or dealing with embarrassing gas are more than just physical discomforts—they can disrupt your entire day, leaving you feeling uneasy and self-conscious. Whether it’s an important meeting, a social event, or simply going about your day, digestive issues can make you feel very unconformable, both physically as mentally. Fortunately, there is support, Intoleran’s specially formulated vegan, dairy, gluten, and soy free supplements are designed to quickly help reduce occasional gas, bloating & indigestion*. Helping you feel comfortable, confident, and ready to take on your day without digestive distractions


Trusted by more that 100.000 happy customers and professional dietitians worldwide

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4.61 – Excellent
View all reviews
03/10/2024
Starchway
Bowel movements, stomach, and digestion better.
Verified review
03/10/2024
Quick delivery and the starchway takes…
Quick delivery and the starchway takes care of my issues.
Verified review
30/09/2024
Very unhappy
Ordered it last week and still haven’t gotten it. Still no tracking information because UPS hasn’t received it. Very confused.
Verified review
27/09/2024
⭐️⭐️⭐️⭐️⭐️+
My 16 yr old daughter became lactose intolerant out of nowhere. She was having pretty severe reaction from burping, gas, nausea, vomitting, and stomach aches. I found Intoleran online and thought we’d give it a shot. And after the first week of taking it she has been able to have all the dairy she wants. We will continue to buy it. I do wish they would offer a subscription for it though. Would make it alot easier getting it every month.
Verified review
25/09/2024
Found no help with my gastric issues
Found no help with my gastric issues
Verified review
24/09/2024
Does not seem to help me digest…
Does not seem to help me digest fructose significantly better
Verified review
24/09/2024
I like the fructase product and the…
I like the fructase product and the starch away. I think these are unique products that help with digestion.
Verified review
19/09/2024
Shipping said 2 days but took 6 days
Shipping said 2 days but took 6 days. Some capsules in my box of Statchway were empty
Verified review
17/09/2024
I like the convenience of the drop
I like the convenience of the drop, rather than a powder. It works great at making my milk digestible.
Verified review
14/09/2024
Seems to Work
It seems to be working but I want to wait to see how it is working at 2 weeks. I love that it is once a day!
Verified review
10/09/2024
Product works for me.
Product works for me.
Verified review
09/09/2024
A stellar company.
I have had a great experience with your company. When the payment method for my subscription failed, I was notified immediately, and was able to fix the problem without a lag in my medication delivery. My only issue is that, if a holiday occurs between the processing and delivery of my medication, I sometimes have to go several days without it. This negatively impacts the cumulative benefit. As it is, I am lucky if I have 1 pill left, by the time the next prescription arrives. Thank you. Denise Leuschel
Verified review
08/09/2024
After taking only a few times
After taking only a few times, I’ve noticed a big difference!
Verified review
08/09/2024
Great company
I have been shopping with Intolerance for a few years now. They are reliable and I get my orders on time. I find the enzymes that I need and get them on time.
Verified review
02/09/2024
I really need the Intoleran suite of…
I really need the Intoleran suite of dietary enzymes. I would have real trouble without them. I have many food intolerances.
Verified review
30/08/2024
Love it but it doesn’t cover all of my…
Love it but it doesn’t cover all of my problems with fodmaps. I still have to take Fodzyme and Fodmate with it. I wish I could subscribe so it shipped out automatically because the shipping take awhile. I also wish you made more blends. I don’t eat dairy and would rather have a blend that addressed a plant based diet.
Verified review
23/08/2024
changed the way I eat food
I absolutely love what Intolerant offers. I have Sucrate deficiency. The medicine is available but extremely expensive even through the insurance, but this little pill bridges the gap very effectively, and it’s lovely that you can travel with it. I also love the fiberactase pill. It works great to with Indian food especially dal and beans . It is truly changed the way I eat and enjoy food. Thank you thank you
Verified review
22/08/2024
This is my second order
This is my second order. I was nervous the first time buying.. but was glad to find it works great 100%. I eaten food I have not had in over a year. I had to stop eating so many foods I love because of this histamine. But thanks to these pills in eating again even though it’s a small window that makes it safe for me I’ll gladly take it. Thank you all so much. I will show these to my doctor on my next visit. What can be done to improve our make better.. I would say give us a longer time if possible like more than 3 to 4 hours. Other than that this is a miracle product. Do you make TV commercials on this. This something everyone needs to know about. Than you
Verified review
19/08/2024
Sadly, didn’t help with fructose intollerance
I bought four boxes from Amazon and because I was concerned about how long it would take to get shipments, I bought the same number direct from your company. Sadly, they have not helped with fructose intollerance and I have six boxes unopened. Can I return them?
Verified review
11/08/2024
I have been sick for years
I have been sick for years. I now know what foods to avoid but I still get exposed, when I do or I don’t trust the food I eat I will take one of these and I will be healthy and well. I am so blessed by this product it has given me hope for a healthy full life.
Verified review
09/08/2024
Allowed Me To Eat Again
The Intoleran allows me to eat foods with onion and garlic in it. Highly Recommend.
Verified review
09/08/2024
Fantastic lactose products
Fantastic lactose products. Way better than anything I’ve found on store shelves in the US. Shipping is fast and easy to order.
Verified review
09/08/2024
Ordering has always gone smoothly
Ordering has always gone smoothly. Very needed products. Good alternative to very expensive prescription drugs.
Verified review
08/08/2024
Process was easy if you have a US…
Process was easy if you have a US address. Took a while longer to get here.
Verified review
08/08/2024
Timely delivery
Timely delivery, excellent customer service.
Verified review
08/08/2024
Thank God no more break outs.. I can eat food again
I was going to come back here to leave a review I am so glad that I found this website I’m glad that I am taking these pills and has given me back my life to be able to eat some of the foods that I thought I would never ever be able to eat again these intolerant pills are incredible I have a bit of all of it I have the cheeses I can’t eat certain fruits I can’t eat can’t drink milk mayonnaise mustard ketchup i mean it’s just a list of things that will break me out and have me looking horrible so I’m glad that I found these pills I’ve been able to eat things and I have not broke out one time so yes this is worth 10 Stars 20 Stars I love it thank you
Verified review
08/08/2024
Very pleased with product & repeat customer.
Very pleased with product and have been a repeat customer. Fulfillment is a bit slow, either ordering direct or via Amazon: slow shipping. Also, price is very high, and fluctuates consistently: order one week at a specific price, next week price is example $14 higher than previous week.
Verified review
08/08/2024
My daughter has started using Intoleran…
My daughter has started using Intoleran this week for the first time. She has been taking it now for the past 5 days and has had excellent results with no stomach issues when she is eating starch or sugar!
Verified review
08/08/2024
Starchway
I use the Starchway product and it helps. Period. What more is there to say?
Verified review
08/08/2024
Very poor company to deal with!
I never received a reply to my email inquiry, product not delivered on time, signed up for discount coupon but not acknowledged on time as expected, when I called company in the Netherlands, what language was on their outgoing message? Certainly NOT English !!!
Verified review
08/08/2024
Great product. Quick shipping.
This product saves the day when I don’t know what is in my food. When I eat with friends or out at restaurants, there can be ingredients that will give me great pain. The Quatrase pills give me piece of mind and let me eat without offending a host.
Verified review
08/08/2024
I am actually able to eat starch again
I am actually able to eat starch again! I wish the shipping was faster but other than that no complaints.
Verified review
08/08/2024
Timely delivery
Timely delivery, good customer service! Give discount to larger orders. Sell larger bottles of Quatrase – less waste and less costly for consumer.
Verified review
08/08/2024
My gut would be in hot water without…
My gut would be in hot water without these unique digestive enzymes.
Verified review
24/07/2024
The pills work
The pills work. I can’t live without them as low FODMAP alone is not enough.
Verified review
21/07/2024
Intoleran products work well for me
Intoleran products work well for me. They also ship out fast.
Verified review
19/07/2024
Horrible company with no customer service!!!
I sent an email 5 days ago and never received a reply. I never received my 10% discount coupon as advertised despite signing up. Made phone call and greeted by some foreign language…what??? Expected delivery is today; nope post office does not acknowledge package to be delivered. Website says delivery in 2-5 business days: to where??? NOPE not to places in US. Horrible service and company is non responsive to emails+phone.
Verified review
02/06/2024
Steady improvements
First I want to state that I have such deep appreciation and respect for Intolern. The owner and staff have been instrumental in my ability to learn about my health issues and to know how to manage it. The quality of their products are great. They have options for the treatment of intolerances that we don’t have here in the states. They also offer information about different intolerances that makes it possible for us to understand our personal needs. So I was excited when they opened up a website and distributor here. It lessens the wait for our orders and the issues with customs. I see steady improvements with communications and processing of our orders. So I hope this is a permanent solution.
Verified review
23/05/2024
Excellent..worked well..I haven’t been…
Excellent..worked well..I haven’t been able to eat sweets for yrs..I’m fructose intolerant..finally now I can eat sweets again .👍👍
Verified review
12/04/2024
Excellent Product & Service
First, I appreciate that Intoleran makes their lactase tablets with few additional ingredients. Because of this, the tablets work very well for me. I also appreciate the thorough descriptions on the website, the ease of purchasing, & the prompt delivery.
Verified review
01/04/2024
All Stars, Deserved
The product itself is great–I use three of their products–but so is their customer service. They are responsive, considerate, and timely. All the stars for Intoleran.
Verified review
28/02/2024
Quatrase Forte
Quatrase Forte
Verified review
12/02/2024
Enzymes seem effective in most uses…
Enzymes seem effective in most uses I’ve tried, and easily swallowed. Shopping takes too long to arrive, no way to expedite. Need enzyme for fructans.
Verified review
10/02/2024
FODMAP IBS-C Issues Solved!
It solves my carbohydrate FODMAP IBS-C issues. A miracle 🙂
Verified review
20/01/2024
Intoleran saved my quality of life
Intoleran saved my quality of life! I was recently diagnosed with a sucrose deficiency here in the United States. I suffered for two years with life altering struggles. My only options were A) Stop eating all sugar. B) Take Sucraid (very expensive enzyme replacement) On a whim, I searched for an alternative enzyme replacement supplement that was more affordable. That’s when I learned about Intoleran and their “Starchway” product. The changes saved my quality of life. I can now travel without having to preplan where the closest bathrooms are. I can take my kids to and from activities without anxiety and stress. If you have officially been diagnosed with a sucrose deficiency, this is your product! Don’t hesitate to try!
Verified review
08/01/2024
These enzymes are life-changers
These enzymes are life-changers. I buy the ones for starch, fruit and fiber. Glad for big bottles of Starchway. Need them for the US market for the fruit and fiber enzymes too!
Verified review
25/12/2023
Missing link to my IBS
It is the missing link after making the change of eating a limited diet, etc. Everyone should consider these Monash-certified enzymes for gastric problems that present as IBS.
Verified review
15/12/2023
Starchway helps my sucrose intolerance
Starchway helps my sucrose intolerance. I can eat more foods.
Verified review
28/11/2023
Great to have a place to buy Intoleran in the US!
Their Quatrase Forte is excellent for anyone who struggles with garlic, onion, lactose and other intolerances! It is great to be able to eat out with friends and family again! Shipments arrive quickly with the new distribution location in Florida!
Verified review
19/11/2023
Good enough to order again
It gets delivered within a reasonable time. Shipping/delivery update isn’t so good. It doesn’t get updated for several days.
Verified review

Intoleran Quatrase Forte

Extreme bloating after eating or does you gassy stomach controls your daily life?

If you are not sure which foods cause your symptoms, or if you are looking for a digestive enzyme that helps with multiple food intolerances, Quatrase Forte is your best choice. Quatrase Forte is a fast acting enzyme formula designed to support the digestion of the most common gut symptom triggers like FODMAPs. FODMAPs are found in foods such as milk and dairy products, fruits like cherries and apples, honey, vegetables such as onions and garlic, wheat, soy (products), legumes, and processed foods such as sauces, breakfast cereals, and candy. Quatrase Forte helps to reduce occasional gas, bloating and discomfort associated with FODMAP intolerance.* Take back control on your daily life and don’t let excessive gas and bloating makes you feel uncomfortable any longer!

Multiple food intolerance formula

Helps support digestive issues without a restrictive diet*

Helps reduce occasional gas, bloating & indigestion*

Unique enzyme mix of body own enzymes, specially designed for FODMAP issues

Vegan, dairy, gluten and soy free

Easy to take capsule. No need to desolve in water

Affordable and available over the counter


Why Intoleran

Free 1-on-1 Advice

Our team of expert dietitians is always here to provide you with practical advice and detailed information about our products. Schedule an appointment to get free dietary advice!

No effect, money back!

Risk-free trial period with our unique 100-day satisfaction guarantee. The 100-day satisfaction guarantee ensures you can test our products without any worry.

Intolerance test

By learning which foods irritate your gut, you can take more targeted action. Use the Intolerance test to get an indication on which foods pose a risk for you


Quatrase 10.000 (Forte)

Testpack 6 Capsules
  • Helps overcome digestive issues without a restrictive diet*
  • Enzymes specially designed for FODMAP issues
  • Multiple food intolerance formula
  • Helps to reduce occasional gas, bloating & indigestion*
  • Try it with a tespack!

Starchway

Testpack 6 Capsules
  • Helps to digest both sugar AND starch*
  • Easy to take capsule. No need to desolve in water
  • Reduces occasional gas, bloating & indigestion*
  • Vegan, dairy, gluten and soy free
  • Try it with a tespack!

Lactase 20,000

Testpack 6 Scored Tablets
  • Helps prevent gas and bloating associated with digesting dairy*
  • Highest-dosed lactase tablet for the entire meal
  • Easy to break tablet
  • Try it with a testpack!

Discover our full range for Intestinal health

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 in our contact form and we will get back to you

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*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.

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