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Description
IB Synergy - 60 caps *IB Synergy offers comprehensive support for intestinal health while targeting the brain gut connection. IB Synergy is designed to target the enteric nervous system, the nervous system that controls the GI tract. Considered to be the bodys second brain, it is made up of a self contained, complex network of neurons, neurotransmitters, and proteins embedded in the lining of the GI system. It is responsible for all aspects of the digestive process, from
IB Synergy™ offers comprehensive support for intestinal health while targeting the brain-gut connection. IB Synergy™ is designed to target the enteric nervous system, the nervous system that controls the GI tract. Considered to be the body’s ‘second brain,’ it is made up of a self-contained, complex network of neurons, neurotransmitters, and proteins embedded in the lining of the GI system. It is responsible for all aspects of the digestive process, from the esophagus to the stomach and small and large intestines, and works to regulate normal digestive activity.
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Highlights
- Benegut™ is a special proprietary extract of Perilla frutescens obtained by water extraction of this herb’s leaves. It demonstrates antispasmodic, prokinetic (stimulating GI motility) and anti-inflammatory effects, which help normalize and promote healthy bowel function and help with relief from GI symptoms.
- Saccharomyces cerevisiae (as Lynside® Pro GI+) is a well-tolerated species of probiotic yeast that has been shown to help improve gastrointestinal comfort and intestinal flora. Research shows that it demonstrates analgesic (pain-relieving) properties, helping to reduce digestive discomfort and abdominal pain in individuals with IBS.
- Glutamine is a critical nutrient for the health of the digestive tract. It is one of the most commonly used amino acids in the body to repair tissues, particularly high turnover tissue such as the epithelial cells of the intestinal lining. Glutamine deficiency can cause severe intestinal degradation and supplementation can enhance intestinal healing and repair.
- 5-hydroxytryptophan (5-HTP) is a precursor to serotonin, the ‘feel good hormone’, and a dominant neurotransmitter in the enteric nervous system. Serotonin affects pain perception, anxiety and mood, and is important for proper digestion.
IB Synergy™ May Benefit:
- Enteric nervous system (brain-gut connection): improving gut regularity, gut motility, bowel movement and stool frequency, GI pain and discomfort, symptoms related to digestive disorders
- Non-inflammatory GI conditions such as IBS-C (constipation dominant) and IBS-D (diarrhea dominant)
- Comorbidity of stress/depression associated with other health conditions such as fibromyalgia
Disclaimer:
††An IPSOS 2023 survey among US functional medicine practitioners, in an average month, Designs for Health is their personally most trusted practitioner supplement brand, meaning a brand that is sold by healthcare practitioners in their office.
††An Ipsos 2023 study among a random sample of 160 functional medicine practitioners including Doctor's of Osteopathic Medicine, Pharmacists, Acupuncturists, Athletic Trainers, Personal Trainers, Fitness Trainer/Coaches, Chiropractors, Integrative Medicine Specialists, Naturopathic Doctor, Homeopaths, Medical Doctors, Physical Therapists, Nurse Practitioner/Physician Assistants, Registered Nurses, Nutritionists, Massage Therapists, Occupational Therapists and Dieticians that are aware of Designs for Health and recommend supplements to their patients.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.3 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 5
Excellent value, consistent fit, cool, comfortable and durable.
Size: Large, Color: Army Green
I have purchased 20 plus of these shirts in the past six months. The first batch in spring, figuring if any inconsistencies or quality issues arose upon delivery, no problem. Amazon's return policy has always been hassle free. After trying on the fourth shirt and noticing no outstanding flaws or differences, all were simply opened, laundered and hung on a hanger. The material is 100 percent cotton, but assuming they are removed from the dryer immediately (medium heat) - no ironing necessary. No appreciable shrinking is observed and no outliers in the batch.
My sport shirt size is men's US large regular fit. Other relevant sizes - 17.5 inch neck, 46 inch shoulders, 34 inch sleeves and 36 inch waist. Overall fit of these shirts is of appropriate roominess without bagginess. Shirt tail length is spot on, work dress code requires tucked in, and they stay tucked in. Casual requires not tucked in, and unless I am reaching for the sky with both hands while on tip toes, the shirt tail/ belt line is not breached. The sleeve length could have been extended by an inch since they taper to an elastic cuff, requiring that the sleeves are pulled back to original position following an extended reach. But given the choice, the sleeves as is are preferred over a straight cut without the elastic cuff.
As an upgrade to the T shirt appearance of the shirt tail when not tucked in, the side seams end with a reinforced, one inch inverted V, a feature not typical in this price range.
To date, durability has not been an issue. Fraying, fabric pilling and fading have not occurred. It is quite difficult, if not impossible, to differentiate the age of two duplicate color shirts purchased in two separate batches.
Again, excellent value, consistent fit, cool, comfortable and durable!
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Reviewed in the United States on October 30, 2017
★★★★★ 4
Decent, definitely got the job done
Size: X-Large, Color: Light Grey Heather, Size: X-Large, Color: Light Grey Heather
The came out to be a pretty decent quality for the price. Was going to a polo match and just needed something to creat on for my date
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Reviewed in the United States on April 1, 2026
★★★★★ 5
An Extinct Breed - Get before they are gone
Size: Medium, Color: Red
In my day polos used to be soft thick 100 % cotton with generous sleeves covering the upper arm till above the elbows and collars standing high and grand and covering the back of the neck till below the hairline. They had substantial structure/body (shape that held) and ultra comfortable soft cotton. This was my go to piece of clothing to step out in (as opposed to round neck collarless T-Shirts that I wore only at home or for sporting activities).
However, this simple good thing was not to be taken for granted. As time went by, I watched in horror this simple evergreen staple slowly vanish - being replaced by plastic, toxic, carcinogenic trash (synthetic, polyester, 'performance', 'hi-tech') being passed as clothing riding solely on deceptive/misleading/convincing marketing and rapidly transient 'fast fashion trends'. These pieces of junk being passed as 'performance polos'/'hi-tech' had no 'body', clung to your skin like plastic, caused my sensitive skin to itch, with arms so short as if there was shortage of clothing material in the world and were of such thin cheap uncomfortable material that I would wonder how in the world do people put these on their bodies.
The 'trend' continued ...
Fast forward to the present day, finding the 'cotton polo of my youth' is like finding a dinosaur. The polo I grew up with is practically extinct - replaced by trash made with ever cheaper feeling and more toxic materials. Its a win win for the corporates/brands - cheap synthetic lab created materials astronomically marked up (riding on advertisement) - filling the corporate pockets unlike never before and successfully 're-programming' the minds and purchasing behavior of the new generation to accept, get used to, and even get addicted to such toxic 'hi-tech' trash. As for the manufacturing ? No problem - hire some MBA's (with zero knowledge/passion for good quality textile/garment manufacturing) - their sole purpose to be 'maximizing profits' for the next 'earnings report' and they would find the 'cheapest' offshore factory to outsource the manufacturing to. This being a continuous process - if you get a cheaper bid from another factory, just switch to it. No wonder you can never get consistent material, sizing, quality for the exact same product purchased even months apart.
Not just that - even brands that sold fantastic quality 100 % cotton polos at a very reasonable price like Tommy Hilfiger etc went STEEP DOWNHILL. A Tommy Hilfiger polo being sold today is NOWHERE NEAR anything like the quality they had even a few years ago (even though still being theoritically 100 % cotton, the quality (material, cut) now is absolutely junk - in fact they went from being my favorite Polo Shirts (thick, soft, cloud like cotton with generous neck and sleeves and amazing body, texture and shape and in high quality colors and finish) to absolutely shockingly unwearable pieces of garbage (thin, rough, itchy cotton with skimpy sleeves and flat collars and dull cheap finsih and colors with NO lusture, body whatsoever).
I always wish I had seen this day come. I would have stocked up on a lifetim's supply of 'real' clothing when they were still available.
Given the above, I am extremely surprised (pleasantly) by this Amazon Essentials Cotton Polo. This is 100 % cotton, has generous non-skimpy sleeves and has decent material and shape reminiscent of the 100 % cotton polo I am habituated to from my time. Quality of material wise - it is about 65% - 70% of the cotton polos of yesteryears - BUT - even THAT - is like finding diamond (or a dinosaur) in these abhorrent-clothing-times for the 100 % cotton polo lover.
Get this before the 'real cotton polo' is gone for good. I think I may be getting a few.
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Reviewed in the United States on August 10, 2022
★★★★★ 5
Love these polos
Size: Large, Color: Olive
Nice material, fits true to size, colors are nice. Great work shirt in an office setting.
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Reviewed in the United States on June 4, 2026
★★★★★ 3
Sometimes Good, Sometimes Not So Good...
Size: X-Large, Color: Aqua
I've bought several of these shirts in the past, and I've always been very happy with them, right up until my latest purchase. Apparently, depending on which color/style you choose, the shirts may be manufactured in a completely different country. And despite Amazon's efforts to make sure their clothing brands have consistent sizing across the board, it's now clear to me that some of those countries are not on the same page. Case in point: Guatemala.
My latest Amazon Essentials polo shirt purchases consisted of the colors 'light yellow' and 'rust'. Now, the light yellow shirt seems fine. Maybe a tiny bit smaller than my previous shirt purchases, but nothing major. (I think it says made in Chihuahua - but it's hard to tell.) However, the rust colored shirt is drastically smaller than all my similar-sized Amazon polo shirts. I bought it in size Large, but the shirt tail alone is nearly four inches shorter than my previously purchased Amazon Essentials polo shirts. And while the Large-sized Amazon polo shirts normally fit me quite comfortably, with a little bit of room to spare, this rust-colored shirt is skin-tight. If I didn't know any better, I'd swear it was a size Medium masquerading as Large.
All of my previous shirt purchases (I now realize) are labeled as being made in either Madagascar or Vietnam. Those are great. They fit wonderfully. But this new rust-colored shirt (once again, same brand - Amazon Essentials) is labeled as made in Guatemala. And let me tell you, the factory in Guatemala is not on the same page as the factory in Madagascar. Not even close.
So yeah, these are great shirts. So long as you happen to buy the colors/styles that are being made in Madagascar or Vietnam. But buyer beware if you happen to get one from the factory in Guatemala, because those guys are using a whole different set of rulers over there. And unfortunately, there's no way to tell until it arrives on your doorstep.
I'm normally a big fan of Amazon brand products. But this experience has made me quite a bit more wary about buying their clothing items in the future. It really is so very important that their brands have consistent sizing across all colors and styles.
P.S. I actually bought the rust-colored shirt TWICE, because I at first assumed I must have gotten a mislabeled product. But, nope. Both rust-colored shirts are the same, drastically-smaller size, and both are labeled made in Guatemala.
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Reviewed in the United States on June 9, 2020
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