Let customers speak for us
from 406 reviewsIntestinal Fortitude’s grassfed colostrum is a pure and healthful supplement that your body will love. You folks keep doing what you are doing! You’re doing an excellent job of delivering excellent products with reasonable cost. Thank you for all your efforts!

I have Crohns Disease and overall issues with my digestive system. Hard, soft, and explosive liquid experiences. Since taking AI-5 and GLR-6 at night, my experiences have been NORMAL and I have not suffered from any cramping or sudden urges to rush to the restroom. This is literally a game changer and it’s for the realz!!! Thank you for sharing these life changing supplements!

I believe this product is doing positive stuff. Clearly this is one thing in nature that reacts/interacts positively with the human digestion process.

I ordered this by suggestion of my daughter who started using products by this company. We both have gluten sensitivity issues, therefore digestive issues , ie "leaky gut." This product helps with overall digestion and no after effects. I also recommend the GLR-6 to repair gut lining.

Easy to swallow, flavorless, can see the results immediately in the comfort in the digestive system, also a good probiotic will reflect on the skin complexion (this one did!)

I've been looking into this company and I like what I see. The bottles are well-sealed and the capsules are easy to swallow with no weird aftertaste, burps, or other ill effects. I'm hoping they work well, but time will tell. I decided to add this bacteriophage blend to the mix while also taking their digestive health supplement for a very complete digestive health approach. The supplements themselves are an excellent blend to help ease inflammation in the gut and facilitate healing. So far, I'd definitely recommend.

I'm very impressed with this company and their products. Great value for the price and well researched combinations. You won't be disappointed. I will continue to purchase their products.

This product was the missing link in my gut health protocol. When I started using this, the bifido bacteria became much more effective, bloating finally stopped for good. I feel better after taking the first month but I bought a second bottle whcih I'm taking for another month as maintenance.
If you take digestive enzymes make sure this is kept far away from enzymes - it's a protein, so it can be digested. I found it to be most effective when taken right before bed or immediately upon waking (alongside a morning dose of bifido bacteria)

Very good product. Helps balance your digestive system.

I first discovered bacteriophages when I developed long haul covid issues, and was searching for a way to counter some of the really intense GI issues that came up. Floraphage was the first supplement I found that actually helped in a clear and detectable way, which was really impressive. I don't have the same level of GI issues now (thank goodness) but continue to take the phages at the same time that I take my probiotic supplements. For the past couple of weeks, I've been taking Intestinal Fortitude Phage 1 in lieu of Floraphage, in the same way, at the same time of day. I've found it to be effective and helpful in my regimen of gut-supporting supplements.

PreForPro is a pretty safe bacteriophage blend (of course it's always possible some individuals could be extra sensitive to even the most benign supplements) with research to back it. It is sometimes added to other products and I've taken it before that way, but this is a nice low cost way of adding in into your own personal stack of prebiotics and probiotics (whether it be this company's or someone else's).
I have severe IBS-C/SIBO-C and I personally don't find those big blends of common probiotics to be helpful but rather counterproductive, I prefer to use high dose 1 probiotic type, that is tailored to my current goal(s). Personally I recommend to look into what specific type(s) of probiotics would help what actual problem you have with your gut (like, is it diarrhea or constipation? a specific kind of infection you're combatting? do you have bad cholesterol or want to get thinner?). I also like to take Floraphage or Tributyrin sometimes with my probiotics. Rather than to keep continuously taking the same thing, overall I find it helpful to rotate certain helpful products, although I do continuously take triphala and my diabetes probiotic.
I wouldn't say within hours but rather by a few days to a few weeks, you should be getting some positive results out of this product. I definitely feel that it helps to support my other products in doing what they're supposed to. You should look at phage therapy research to get some ideas about how this could fit into your gut health needs, but this is, for example, a useful product to add to a SIBO protocol because it helps destroy biofilms in your intestines and it kills stubborn antibiotic resistant bacteria. It could be useful to combat gut dysfunction after surgery, or bacterial or viral infection resulting in bacterial overgrowth. By clearing out harmful bacteria, you give your body more of a chance to grow positive bacteria from your probiotics. PreForPro even seems to help lower cholesterol in combination with probiotics shown to reduce cholesterol such as Bacillus subtilis DE111 (this is a spore probiotic which can be hard to tolerate if you have a very bad gut but I've had luck with Researched Nutritionals CoreBiotic Sensitive). So this could potentially help boost the effectiveness of many different kinds of probiotics.

I like this product a lot because it doesn’t have any adverse side effects. I always feel great when i take it in the am

I LOVE this product and that I only need to take 1 per day. It's very convenient and a great value for high quality ingredients.
