Guide

Does Wellah L-Glutamine work? Five grams a day against trials that used fifteen

Wellah L-Glutamine is a once-a-day powder built around 5 g of L-glutamine, with folate and three plant extracts that are usually sold for urinary-tract support, and it comes in an unflavored version and seven flavors. The brand markets it for bloating and the gut lining. This page sets out the label, the glutamine trials against the dose in the scoop, the reviews, and the price and refund terms by route.

What Wellah L-Glutamine is, and what it is not

The Unflavored panel, read from the label images on Amazon, is headed Supplement Facts and lists 50 servings of one 5 g scoop. Every line has its own weight; there is no proprietary blend.

The Unflavored panel says “Other ingredients: None.” The flavored versions have the same actives in a 7 g or 8 g scoop and add malic and citric acid, natural flavors, silica, calcium silicate, a color (spirulina or beta carotene), stevia and monk fruit. The formula depends on the flavor. The three plant extracts total 180 mg against 5,000 mg of glutamine, and dandelion, D-mannose and cranberry are ingredients sold for the urinary tract; we found no gut trial of those three at these amounts. The gut case for this powder rests on the glutamine.

One label detail does not line up. The front of the Unflavored tub names “dandelion, uva ursi, & cranberry extracts,” and several Amazon ingredient lines list uva ursi extract, but no Supplement Facts panel we read prints it. We could not settle which version is in a given tub.

The trial of the product itself

There is none. We found no trial of Wellah L-Glutamine or of the combination of glutamine with folate, dandelion, D-mannose and cranberry. The brand page calls the powder a “Gut Reset”; that is a brand claim, and the evidence below is for glutamine alone.

What glutamine is, and why the lining idea exists

Glutamine is an amino acid, and cells lining the intestine burn it as a main fuel. That is the whole basis of the “gut lining” idea: when the gut is under stress from infection, illness or hard exercise, extra glutamine might help those cells keep the barrier between the gut contents and the bloodstream tight.

The glutamine trials against 5 g a day

The trial usually cited enrolled 106 adults with IBS-D that began after a gut infection and with raised intestinal permeability. They took 5 g of glutamine three times a day, 15 g a day, for 8 weeks. A fall of at least 50 points on the IBS severity score came in 43 of 54 on glutamine (79.6%) against 3 of 52 on placebo (5.8%); daily bowel movements fell and the permeability test normalized in the glutamine group, and adverse events were low and similar between groups (Zhou et al., Gut, 2019). It was a small trial at a single center in one subgroup of IBS.

A second small trial gave 15 g a day for 6 weeks alongside a low FODMAP diet to adults with IBS, 22 completing in each group, and the IBS severity score fell 58% in the glutamine group (Rastgoo et al., Frontiers in Nutrition, 2021).

On permeability itself, a meta-analysis of 10 placebo-controlled trials in 352 people found no significant overall effect of oral glutamine. The reduction appeared only in the subgroup taking more than 30 g a day (Abbasi et al., Amino Acids, 2024).

Set beside those figures, a scoop is one third of the dose in both IBS trials and a sixth of the dose where the meta-analysis found an effect. We found no trial of 5 g a day for gut symptoms. The one large result was also in people with post-infectious IBS-D, not in bloating in general, which is how the brand markets the powder. Matching the trial dose would take three scoops a day. The same dose arithmetic for another 5 g scoop is in the Silver Fern Gut Repair guide, and the loose-stool trials are set out in the loose stools and IBS-D guide. A capsule formula with a much smaller glutamine amount is covered in the Liver Medic Leaky Gut Repair guide.

How to take it

The label directions: mix one scoop daily with 6 to 10 ounces of water, or as directed by a healthcare professional. Nothing is printed about food or time of day. The trial dose was spread over three servings a day; the label does not give that instruction, and the trials ran 6 to 8 weeks.

Side effects and who should not take it

The tub carries one warning: for healthy individuals 18 years and older, with a line to consult a healthcare professional before use if you are pregnant or nursing, taking medication, or have a medical condition. The reviews we read mention taste and delivery rather than side effects. One older review says the dandelion has been hard on the reviewer’s kidneys, a single report. No allergen statement is printed on any panel, tub back or brand page we read, so the allergen status is not disclosed.

What the reviews say

The brand’s own page shows a Judge.me widget at 4.82 from 174 reviews; 173 are flagged as verified buyers, and 160 are for the powder, the rest for a variety pack. On Amazon the Unflavored listing is 4.5 from 85 ratings (73% five-star, 3% one-star), and six flavor listings run 4.4 to 4.7 from 76 to 318 ratings each, 1,097 ratings across the seven listings. The Amazon seller is a third party, eSupplements. We could not read the Trustpilot page. Of the eight top reviews on the Unflavored listing, one is marked as a free-product review.

The recurring praise is taste and mixing: it dissolves without clumping, and the Unflavored version is described as undetectable in coffee or water. About 100 of the 160 powder reviews on the brand page mention taste. Fewer, about 9, mention bloating, usually as less bloating during the day, and a few people with IBS describe fewer stomach aches. The recurring complaints are the flavor of particular versions (too sweet, or no taste at all), a dose some reviewers consider small at 5 g, no visible change, and a delivery wait.

Price, the subscription and the refund terms

Fifty servings is fifty days at one scoop a day.

The brand’s price is the same for all eight flavors, and its subscription is listed as free delivery every month with 10% off. Shipping on one-time orders is calculated at checkout. The brand’s published refund policy is a 60-day money-back guarantee of the purchase price less shipping and handling, requested by email. The brand says the powder is third-party tested, and Amazon says it was verified by independent laboratory testing; neither names a laboratory, and we found no certificate of analysis or NSF or USP mark.

Who Wellah L-Glutamine is for

• Someone who wants glutamine in a flavored drink and accepts 5 g a day, a dose no gut trial used.
• Someone who wants an unflavored glutamine powder with folate and the three extracts and has checked the label for the uva ursi question.
• Someone following the IBS trials would be taking three scoops a day, which also triples the daily amounts of folate and the three extracts.

Plain glutamine powders with a single ingredient are in the catalog, NOW Foods L-Glutamine Powder at $0.27 a day and Thorne L-Glutamine Powder at $0.74, each serving about 5 g; they carry no folate or plant extracts. If the main complaint is bloating without loose stools, the bloating guide starts from the cause, and the quiz narrows the choice by symptom.

The products in this catalog

Common questions

Sources

• Zhou Q, Verne ML, Fields JZ, et al. "Randomised placebo-controlled trial of dietary glutamine supplements for postinfectious irritable bowel syndrome." Gut, 2019;68(6):996–1002. doi.org/10.1136/gutjnl-2017-315136 (NCT01414244)
• Rastgoo S, Ebrahimi-Daryani N, Agah S, et al. "Glutamine Supplementation Enhances the Effects of a Low FODMAP Diet in Irritable Bowel Syndrome Management." Frontiers in Nutrition, 2021;8:746703. doi.org/10.3389/fnut.2021.746703
• Abbasi F, Haghighat Lari MM, Khosravi GR, et al. "A systematic review and meta-analysis of clinical trials on the effects of glutamine supplementation on gut permeability in adults." Amino Acids, 2024;56(1):60. doi.org/10.1007/s00726-024-03420-7
• Wellah brand page: label images, directions, flavors, price and subscription. wellah.com/products/l-glutamine-powder-for-women
• Wellah refund policy. wellah.com/policies/refund-policy
• Amazon listing (Unflavored): Supplement Facts image, price, ratings and safety information. amazon.com/dp/B0DQ6CLWCD; flavored listings, for example Blue Hawaii. amazon.com/dp/B0DQ6DDZQD
• Judge.me review widget on the Wellah product page (public widget feed): rating, verified-buyer flags and review text.