Let customers speak for us
from 435 reviewsI like all the Intestinal Fortitude products but my favorites by far are the L-glutamine and GLR6. The larger quantity the better. I’ve tried other brands of similar ingredients but Intestinal Fortitude is the best in my opinion.
![L-Glutamine Powder - 500 Grams](https://cdn.shopify.com/s/files/1/0177/6916/8960/files/Frame2_70x70.png?v=1693058756)
This product saved my life! I couldn't go anywhere without the fear that my stomach was going to give me issues. I recommend this product profusely!
![AI-5](https://cdn.shopify.com/s/files/1/0177/6916/8960/products/AI-5Box-LabelmockupJPG_1_70x70.jpg?v=1644030867)
I love this supplement. I’ve been taking Colostrum for several months and can feel a different in my overall wellbeing.
![Colostrum](https://cdn.shopify.com/s/files/1/0177/6916/8960/files/Frame2_1_70x70.png?v=1693058799)
Megustaria que sacaran un producto con bacteria del suelo para matar la candida por ejemplo bacillus laterosporus, bacillus megaterium, bacillus pumilus, Bacillus amyloliquefaciens, bacillus mucilaginosos, peanibacillus polymyxa, fabriquen ese producto por favor que tengo muchas candidiasis invasora disiminada para combinarlos con phage1 demen respuesta en mi correo
![Phage-1](https://cdn.shopify.com/s/files/1/0177/6916/8960/products/Phage1Box-Labelmockup_70x70.jpg?v=1643468911)
I have been healing my gut after a rough couple of years that destroyed my microbiome, and the l-glutamine, probiotics, and prebiotics from IF have been essentials to rebuilding a new and ideally functional internal me. I hold my body to high athletic stadards, and this helped get me back on track.
![PREbiotic GOLD](https://cdn.shopify.com/s/files/1/0177/6916/8960/products/PREbioticGoldBox-Labelmockup_70x70.jpg?v=1637721701)
This is actually my second month using GLR-6. It's literally the only product I've tried so far that actually works. Great job guys!
![GLR-6](https://cdn.shopify.com/s/files/1/0177/6916/8960/products/GLR-6Box-LabelmockupJPG_3_70x70.jpg?v=1644031053)
Very happy with AI-5. I take it along with the CLR-6 and can feel the difference. Great duo for gut issues.
![AI-5](https://cdn.shopify.com/s/files/1/0177/6916/8960/products/AI-5Box-LabelmockupJPG_1_70x70.jpg?v=1644030867)
I was taking several different allopathic medications over multiple years for a variety of autoimmune conditions. And as hard as I worked at getting "normal" my system just seemed to go from one extreme mode (sometimes could not be more than 15 seconds away from a facility) to the extreme opposite. Out of frustration, I gave up all of the allopathic medications and then found GLR-6. I started taking it and steadily, it got better every day - a little at a time. After 4 months of taking it, I still have some issues, but I can generally tie it back to something I ate. And after that four months, I am so much better than I had been for a long time. Would I recommend it? Absolutely! Excellent product. Thanks guys!
![GLR-6](https://cdn.shopify.com/s/files/1/0177/6916/8960/products/GLR-6Box-LabelmockupJPG_3_70x70.jpg?v=1644031053)
I take the Pro-B11 along with the Prebiotic GOLD.
Great combo. I will continue ordering both!
![Pro-B11](https://cdn.shopify.com/s/files/1/0177/6916/8960/products/43_70x70.png?v=1643469647)
This product I use daily for my digestive system support and health. I find these more helpful than medicine I’ve been on for years. Have seen better results and felt better than before. So much so me and my husband both take this together. I’ve told my family about it and definitely recommend this for everyone who suffer with IBS or IBD.
![PREbiotic GOLD](https://cdn.shopify.com/s/files/1/0177/6916/8960/products/PREbioticGoldBox-Labelmockup_70x70.jpg?v=1637721701)
I love the colostrum and I use it morning on an empty stomach and then at night a few hours after eating my last food and a few hours before the GLR-6. It calms my whole digestive track.
![Colostrum](https://cdn.shopify.com/s/files/1/0177/6916/8960/files/Frame2_1_70x70.png?v=1693058799)
I am so glad I found this company! I started with GLR-6 and am now on my 2nd bottle of Phage 1. I feel so much better. My stomach feels consistently better throughout the day. No issues when of after I eat. Just a total change in my daily life activities. I can stay all day without any episodes/cramps or discomfort.
![Phage-1](https://cdn.shopify.com/s/files/1/0177/6916/8960/products/Phage1Box-Labelmockup_70x70.jpg?v=1643468911)
I LOVE GLR-6! I was looking for these ingredients individually and stumbled upon this product and soooo glad I did. I had no idea what an immediate difference these supplements would make. I wish I would've foudn about about these products 20 yreads ago. I had no help from military doctors just that I would have IBD for the rest of my life with no solution. I found the solution with Intestinal Fortitude. I loved it so much, I am trying their other products as well. I am grateful.
![GLR-6](https://cdn.shopify.com/s/files/1/0177/6916/8960/products/GLR-6Box-LabelmockupJPG_3_70x70.jpg?v=1644031053)