Best Glutamine Supplements Reviewed & Rated for Quality
Glutamine is considered a non-essential amino acid. Amino acids are molecules used to build proteins and enzymes. L-glutamine is the most abundant that is essential for functioning. The human body creates it naturally; however, as we get older, it becomes difficult for the body to produce the recommended amount. Glutamine offers a variety of benefits as it encourages healthy muscle muscle repair and muscle tissue development.
Glutamine is the preferred energy source to help protect the immune system as well as protecting the digestive system. It performs on a cellular level as well. A healthy dose gives you the energy needed for intense workouts. Glutamine also helps with gastrointestinal health. It acts as an essential neurotransmitter for the brain as it enhances mood. In other words, glutamine benefits the body for a variety of reasons. Here is a look at our top choices for those interested in glutamine supplementation.
In a Hurry? The test winner after 8 hrs of research
5 grams of pure glutamine per serving
4 sizes to choose from
200 servings per container
- Optimum Nutrition
- NOW Sports
- Body Fortress
- KAGED MUSCLE
- Jarrow Formulas
- Pure Encapsulations
- Evlution Nutrition
- Criteria Used for Evaluation
- Other Factors to Consider
- Frequently Asked Questions
10 Best Glutamine Supplements
1. Optimum Nutrition
5 grams of pure glutamine per serving
4 sizes to choose from
200 servings per container
Glutamine Powder by Optimum Nutrition is a very powerful glutamine supplement because it may help support muscle recovery from workouts and sports by providing vitamins and minerals that most bodybuilders need on a daily basis. This supplement powder mainly helps reduce rebuild muscle tissue while relieving muscle soreness. Furthermore, Optimum Nutrition supplement powder provides essentially 5 grams of unflavored glutamine which can also be added to protein shakes. Each bottle contains 300 grams of glutamine.Read more
Every vendor must provide a Certificate of Analysis for all raw ingredients supplied. Certified analyses are done through independent laboratory testing and in-house. ON enforced a Hazard Analysis Critical Control Point program. As a continued measure, this process diminishes the chance for chemical, microbiological, and physical contaminants being added to ON supplements. Routine checks are performed for quality assurance on all production, storage, and blending areas, and daily inspections are conducted.
Each serving of UN Glutamine Powder contains 5 grams of unflavored glutamine per serving. The powder is versatile as you can mix it in juice, protein shakes, or plain water. With 4 sizes available, 1000g, 600g, 300g, 150g, this supplement powder instantly dissolves in water.
Cost and Value
Optimum Nutrition has been manufacturing products that support the nutrition goals of athletes and individuals worldwide. ON strives to bring nutrition solutions with the purpose to making a difference in performance. For refunds, ON will refund the full price of the product within 14 days from receiving your refund notice. For exchanges, you can contact their customer service within 14 days from the date of delivery.
2. NOW Sports
Great for vegans
Family owned and operated
Small doses of glutamine per serving
Containing just one ingredient, the NOW Sports glutamine powder is all about simplicity. It is GMP-certified, meaning that it was processed and manufactured under some of the strictest guidelines. The formula is non-GMO and Kosher, so it can be a good supplement for you if you are following a strict diet or are extremely careful of what goes in your body.Read more
NOW Sports glutamine powder contains no salt, sugar, yeast, starch, corn, gluten, wheat egg, soy, milk, shellfish or preservatives. Ideal for vegans and vegetarians.
NOW Sports is a company that provides, unadulterated, natural, high-quality products. All NOW Sports supplements are certified by a global quality assurance program called Informed-Sport. Consumers can be assured that any supplements they choose are effective and safe.
Cost and Value
NOW Sports strive to provide excellent customer service and top-rated quality products. Customer satisfaction is their company’s mission. Returns only apply to any products that are purchased from their website. Purchases made from retailer sites or other websites, or retail stores does not qualify. Consumers should consult the return policy from these sites.
The BulkSupplements glutamine powder boosts muscle resilience against the build-up of lactic acid to help stop soreness and pain associated with it. Plus, it rejuvenates muscle cells that have undergone a vigorous workout, to help you to complete any exercise routine.Read more
Helps With Energy and Endurance
Intense activity significantly depletes the glutamine stores in the body. Studies suggest that glutamine supplementation, such the the BulkSupplements powder, can increase the body’s energy levels. This results in more effective, longer workouts. Glutamine help with the body’s ability to maintain muscle strength.
The BulkSupplements powder contains no dairy, yeast, sugar, additives or gluten. It features a 2:1:1 BCAA ratio. It is one of the top-ranked supplements for its ingredient safety and purity. The one major ingredient is creatine monohydrate. The creatine is micronized. This means that the texture is fluffy and disperses more easily in water versus regular creatine.
Cost and Value
BulkSupplements comes in a variety of sizes - 100 grams to 25 kilograms. As the name suggests, it is recommended to purchase this supplement in larger quantities. The price is what you make it. For returns, BulkSupplements accepts unopened products within 30 days from the date of invoice for a full refund. The company does not issue refunds for opened items. Customers are responsible for return and shipping charges.
4. Body Fortress
Usage as a pre and post workout
4500 mgs of glutamine
No artificial colors
No artificial flavors
Does not dissolve effectively
Body Fortress is a glutamine supplement containing an amino acid that is found in muscle tissue. This helps with supporting lean muscle gain. This glutamine powder is currently one of the company’s high-ranking products, and was noted for being the purest glutamine supplement on the market.Read more
The Ultimate Recovery Fuel
Body Fortress glutamine powder helps you to maintain your activity by sustaining high levels of the amino acid to help assist with muscle recovery.
Created By a Reputable Brand in the Industry
Body Fortress specializes in manufacturing weightlifting supplements and premium bodybuilding supplements at a reasonable price. Their range consist of RTDs, protein powders, creatine HCI, and pre-workout powders. The company is known for their current best sellers, including whey protein powders.
Cost and Value
This powder comes in serving sizes of 4.5 g and 300 grams of powder per container. Body Fortress provide enough supplement for an estimated 2 months of use with 1 serving per day. Even with 2 servings, this supplement is perfect enough for a 1-month supply.
Between the low cost per serving, highly rated reviews, and a high purity rating, It is no surprise that Body Fortress is among the top glutamine supplement brands in the market. The company accepts returns for a limited period of time if you are not satisfied with an item. You can return the unused portion of the product for a refund.
5. KAGED MUSCLE
Rapid muscle recovery
Plant sourced ingredients
Made in the U.S.
Not easily dissolved
Kaged Muscle glutamine powder is straight up, pure glutamine. It contains 5 grams per scoop. Unlike ordinary glutamine, this powder is fermented, supposedly making it biologically available for absorption and easily digestible. This supplement is also derived from vegan sources.Read more
Kaged Muscle is an all-vegan supplement containing plant sourced ingredients, making it one of the purest form of supplements available. It’s not derived from bird feathers, human hair, or pig fur like cheaper supplements on the market. All ingredients that goes into their products are developed in the USA.
Each container of KAGED MUSCLE glutamine powder has a 100% ingredient transparency. You will know exactly what is going into your body. This formula does not contain impurities and is gluten free. Does not contain heavy metals, and hidden toxins.
Cost and Value
The label claims that KAGED MUSCLE is MicroPure quality guaranteed. It is free of illegal substances and stamped with a gold standard seal. This company went out of their way to create a supplement unlike any other.Their patented ingredients to their manufacturing, makes this product different from the others. For those who like to train heavily, this is a great supplement. For returns, if you are not happy with a product, the company offer a 30-day money back guarantee or you can exchange it. Contact their customer support team for more details.
6. Jarrow Formulas
Supports immune function
Protect muscle tissue
Caused digestion reaction with some consumers
Jarrow Formulas' company mission is reflected in its motto of superior formulation and nutrition. The company provides a complete line of nutritional supplements, all featuring quality standards of potency and purity value.Read more
Jarrow Formulas glutamine powder is developed by using microbiological fermentation. This product contains 100% glutamine and uses no other substances. Contains no glutens, no wheat, no dairy, no soybeans, no fish/shellfish, no eggs, and no nuts. Product is suitable for vegans and vegetarians and is non-GMO.
Developed Using Scientific Data
Working toward a mission of providing affordable, effective, cutting-edge formulations based on scientific research. Jarrow Formulas' knowledgeable staff works closely with researchers from academic institutions and universities around the world. Jarrow Formulas strives to offer the highest quality of products to customers for optimal health.
Cost and Value
For returns, if you are unhappy with an eligible product, you can return the product and request a full refund of the purchase price or a credit in the amount of the purchase price. This process has to be done within 60 days from delivery. Eligible purchases include purchases made on the company’s website or Jarrow Formulas webpages that is linked to the company website. Or you can request an exchange of an eligible product.
5 grams per serving
Money back guarantee
Few customers did not notice results
MuscleTech glutamine powder contains 5 grams of glutamine per serving. This works to replenish the glutamine used during exercise. This product is marketed as a micronized, ultra-pure, HPLC tested glutamine supplement which is also available in tablet form.Read more
MuscleTech has put a lot of effort into making certain the ingredients listed on their label match to what’s actually inside the supplement. It is reassuring to know that this product is cGMP and HPLC certified.
Mixes With Your Favorite Drink
Platinum 100% glutamine powder mixes instantly with liquids and is tasteless. Contains no gritty or settling texture. This powder supplement is ideal for mixing with your favorite pre-workout, creatine, or protein drink – making it an effective way to boost your glutamine levels as you enjoy your favorite flavored supplements! Plus, this non-stimulant supplement formula can be used anytime, day or night.
Cost and Value
To ensure a standard of purity and quality, each container goes through a strict Quality Control process. It is verified and tested to make sure that each product meets the Muscle Tech’s high standard of consistency, quality, and purity. For returns, you can exchange or return the unused product within 30 days for a complete refund, minus handling and shipping charges.
Unflavored when mixed with juice and shakes
Aids with acid reflux
Helps improve weak muscles
Made in the USA
Texture is chalky
Funny taste when mixed in water
Nutricost glutamine powder was designed to refuel the body with non-essential amino acids. This is a high quality supplement, suitable for people who are looking to boost their digestive health, immune system, and help with muscle recovery. This glutamine supplement is free of gluten, is non-GMO, and provides excellent value for the money.Read more
Made in the USA
Made in the United States at a GMP facility, each serving offers 5 grams of glutamine at a fraction of the price of their capsules. Manufactured at GMP compliant facilities.
Nutricost is considered one of the largest well-known nutrition companies in the United States. They develop products to help with immune support, cognitive support, and heart health. Their approach of providing affordable quality supplements has earned recognition - together with hundreds of positive rated reviews. Some of their best sellers are citrulline Malate 2:1, pure glutamine powder, and Vitamin C powder.
Cost and Value
Nutricost has the same similarity to Bulk Supplements in the sense that it manufactures single-ingredient products. However, they also have a wider range of supplements that extends beyond just nutrition for immune support, heart health, digestive support, and much more. For returns, Nutricost offers a 100% money back guarantee if you are not satisfied with your product. Their offer applies only for one used product.
9. Pure Encapsulations
Recommended for all people
Great for long-term use
Comes in pill form
Caused a reaction with some consumers
Manufactured by Pure Encapsulations, Glutamine 500 mg provides the body the amino acid in a convenient pill. Every capsule contains free-form glutamine and vitamin C for promoting easy absorption in the body.Read more
This supplement is sourced from vegetables and can be taken with water or juice. You do not have to mix it with water as it comes in a tablet form. Dosages can vary for each person. For best results‚ it is recommended to be taken in 2 to 3 doses during the day. Follow the advice of your health care physician if you have any questions about usage.
The company seeks to manufacture hypo-allergenic dietary supplements. Quality control during the formulation process is paramount. All Pure Encapsulations supplements are created with the most bio-available ingredients whenever possible.
Cost and Value
The supplement’s value lies in its no-fillers approach with no colors or flavors. It is a good solution for people who are seeking the quality of the nutrients which go into their bodies. Statements from suppliers certifies that the ingredients in their products does not contain GMOs. For some nutrients, the company conducts testing to verify the absence of genetically modified materials. For returns, products must be sent back to the company within 30 days. Any claims regarding damages or shortage are made within 7 days of delivery. Returns are subjected to a 15% return fee.
10. Evlution Nutrition
Plant based formula
Made in the US
Do not dissolve well
Being a pharmaceutical grade is just one of the great facts about Evlution glutamine supplements. It is plant-based, making it ideal for vegetarians and vegans. This supplement is gluten-free, in which there are no other listed ingredients on the label.Read more
60 Servings Per Container
Each canister provides 60 servings. Each serving has 5 grams of glutamine. It comes with a scoop for measuring. At an affordable price, the supplement still manages to be a natural product. Even though the supplement can be taken at anytime, (preferably 2 to 3 times a day) it is created to optimize your glutamine levels during and after sports and workouts.
Consumers reported feeling energetic when using this supplement. The various reviews on how easily dissolvable it is when mixed with liquids, you can add it to shakes for a tasty flavor versus adding it to a bottle of water.
Cost and Value
As far as value, the Evlution supplement will save you money versus some of the other supplements on the market. This is true if you will be using it for the long term. Evlution Nutrition provides a 30-day money-back guarantee for consumers. This glutamine supplement definitely offers value!
Criteria Used for Evaluation
A brand is crucial when making a purchasing decision. This is due to the overall impact it will make on a company. Branding changes how individuals perceive a product, as it can also encourage new business and increase awareness.
Branding Gets Recognition
Branding is important to a business because it is how companies get recognition and become well-known to consumers. The logo is an important component of company branding, as it represents the face of the company. A professional logo should be easily memorable and powerful - with the sole purpose of making an impression at first glance.
It Increases Business Value
An established brand increases value in a business by giving a company leverage in the industry. This makes it an appealing factor when trying to generate future business.
It Generates New Customers
A strong brand represents a reputable impression of the company among consumers. They are more likely to conduct business with a brand they are most familiar with. If a brand is well-established and trustworthy, people will be more apt to spread the word.
Creates Trust With Consumers
A well-strategized branding helps a company build trust with existing customers and potential ones. The public will most likely do business with a company that gives the impression of being experts in a particular industry.
Ease of Use
Glutamine supplements can come in many forms. The one you decide to take depends on how well they absorb in your body, and your personal preference. For example, some glutamine supplements are sold in a pill or capsule. Other supplements absorb faster in liquid form.
Certain supplements are sold in pills because liquids may be ineffective for some people. Others need to take a liquid when it becomes difficult for the body to absorb a pill, or when it is difficult for them to swallow tablets or capsules.
And not all forms of glutamine are the same. For example, there are different strengths to choose from. When in doubt, consult a physician about which particular supplement suits your needs.
Take notice that supplements are not endorsed by the FDA in the same manner that drugs are. They do not review supplements for efficacy or safety before they are sold to the public. Always research when choosing new supplements. Other ways to be safe:
If your diet consist of vegetables, fruits, and whole grains, speak with a physician to see if glutamine will enhance the results you are looking for.
Glutamine can be unsafe if taken in high doses. It can also affect people diagnosed with certain diseases.
Breastfeeding or pregnant women should avoid glutamine as it can be harmful to the baby. A prenatal vitamin is sufficient until delivery.
Heart medications such as aspirin, blood thinners, diuretics and steroids may not mix well with a glutamine supplement; and may cause a medical condition to get worse.
People going for surgery should avoid glutamine, as it may cause a negative reaction.
People with certain types of cancer or who are being treated for it should avoid glutamine.
Select studies that used preparations of glutamine were linked with a few side effects. This can include but not limited to gastrointestinal symptoms, swelling of the extremities, infections, headaches, and fever.
As far as drug interactions, a few reports suggested that glutamine may reduce the ammonia-lowering effect of lactulose. For people with hepatic encephalopathy or liver cirrhosis, glutamine may not be the best choice of supplement to take.
Check for evidence from scientific studies. Search for credible publications on how well the product works. You can contact the manufacturer to ask for studies to back up their claims. Find out how they ensure their ingredient label. Make sure the same ingredients are actually in the bottle.
If a product claims to cure a disease, or is listed as “all-natural”, or has a refund guarantee, take precaution. If it sounds too good to be true, then most likely it is.
It is ideal to choose brands that are labeled with the US Pharmacopeia, Underwriters Laboratory, NSF International, or Consumer Lab seal. These companies provide a verification process that ensures that labels contain the ingredients that the label claims. They also check for purity in the ingredients.
Many supplements manufactured outside the U.S. are not regulated and may contain toxic ingredients.
Supplements do not last forever, and may need a little care to ensure their potency. Keep glutamine supplements in a cool and dry place. Avoid damp spots such as bathrooms. Keep supplements on in a locked cabinet or on a high shelf, away from the reach of children.
Some supplements lose their potency when they sit out on the shelf for too long. Do a routine check and throw out any supplements that are past their expiration date.
Expert Interviews & Opinions
Glutamine is one of the amino acids found in the cells and in the blood. It is a source of energy that affect immunity and the intestines. Supplementation can help to protect the lining of the bowel. It is known for enhancing immune cell function. A study showed that athletes with leaky gut uses glutamine to help them to compete in the heat.
One study showed that glutamine provides a coating to the mouth and esophagus in patients diagnosed with neck cancer. It helps with painful swallowing by reducing the chances of getting inflammation in the mouth.
NASH is one of the leading causes of liver disease, which will eventually require liver transplantation. Data from one study shows that glutamine supplements may provide protection against the progression of liver disease. It may also prevent the development of NASH altogether.
One of glutamine’s primary functions is to offer fuel to the body’s immune cells so they are safeguarded against infections. An interesting review showed that glutamine may shorten the length of hospital stay, the rate of infection in hospitals, and a decreased mortality rate for in-patients. This is not a statistic, however. It is an interesting observation.
People take glutamine to increase brain function. It is energy to the brain’s neurotransmitters. Practitioners recommend glutamine supplements and foods rich in glutamine to reduce cravings for alcohol and sugar - which are detrimental stimulants of the brain.
Glutamine might help you to get the adequate amount of amino acids from what is not present in certain foods. Take into account that supplement cannot replace the variety of foods that are needed in a healthy diet. Evidence does show that some supplements can benefit overall health while other studies will require more research.
No glutamine supplement will help with weight loss and muscle building by itself. Be certain that you are ready to be committed to working out and are willing to make lifestyle changes before spending money on a supplement.
Other Factors to Consider
Choose a glutamine that does not contain added synthetic ingredients, colors, and fillers that are unrecognizable. Certain manufacturers often add these ingredients to extend shelf life, to make it aesthetically appealing, or to make it cheaper to manufacture.
There are independent organizations that provide quality testing. For the products that pass inspection, their seal of approval is placed on the label. The supplement labels state that the products contain the accurate ingredients listed on it, that the supplement contains safe levels of contaminants, and that the product was properly manufactured.
An NSF stamped label means that the product has been through a rigorous inspection process. It also means that:
The facility has been audited to comply with GMPs practices.
The supplements have been verified through reviews.
It has been checked for authenticity.
Testing was conducted to check for metals, pesticides, and harmful contaminants.
Audits are held to ensure that manufacturers are following certification codes.
Picking a credible brand of supplement is something to take into consideration. There are new companies that are emerging everywhere, and not all of them are credible. It is the consumer’s responsibility to be diligent in their research. It would be a health risk otherwise.
Manufacturers should ideally formulate their supplements according to scientific findings. Look for raw ingredients when choosing a supplement. Go with a manufacturer who has worked with independent laboratories to ensure that their supplements meet label claims and are void of harmful contaminants.
A reputable company provide product specifications and studies that support their formulas. You should be able to access this information on their websites.
Read the labels carefully to see what form the supplement is made from. These are normally enclosed in parentheses after the nutrient’s name. There are some nutrients listed that does not state what form they come in. For instance, vitamin C can be natural or synthetic. Minerals can also come in different forms. Elemental minerals are not easily absorbed by the body; so a manufacturer will usually combine them with substances like amino acids so that they can be absorbed easily. These types of minerals are called chelated minerals.
In choosing a supplement, make sure that it has enough amount of nutrients for improving your health. Some brands may contain a wide range of ingredients, but if you fail to look at their labels, the dosage amount may be so small that it will not have an effect. So do not be fooled by marketing tactics. It is important to know the recommended dosage before shopping for a supplement. In that way, you can identify which supplement is the right one for your needs.
Value has a huge bearing on a supplement’s quality. Avoid purchasing cheap brands without viewing their labels. Gather up information regarding the manufacturer of the supplement. Some cheaper product brands can save money by using inadequate dosages, improper nutrient forms, and other cost-saving factors.
You can easily get this type of information from companies that evaluate consumer products. They provide test results that are conducted independently. The results will help consumers identify the best supplement products and provide general recommendations.
Benefits of Glutamine For Muscle Building
Below lists direct roles in which glutamine boosts performance and assist the body in repairing or building muscle:
Helps to stimulate muscle protein by supplying nitrogen to help build proteins
Glutamine helps to decrease muscle recovery time.
Increases the growth hormone release and production.
It helps to decrease muscle catabolism during workouts.
Helps with the body’s endurance by supplying glycogen when it is depleted.
Decrease the risk of infection or illness by boosting the body’s immune system.
Assists with over-training during intense activities.
Glutamine intake must be greater than the amount produced by the body.
Other Benefits of Glutamine Supplements:
Aids with a stronger immune system and less prone to infection and disease.
Reverse intestinal damage that may be caused by inflammation
Helps to enhance mood and behavior.
May help with people with neurodegenerative diseases.
May aid with short and long term memory.
Speed wound healing in postoperative patients
A 2001 study reported that patients that were given glutamine supplements showed improvement in nitrogen balance. Other trials reported decreased hospital stay for patients receiving glutamine supplements.
Helps relieve side effects from the treatment of cancer
Glutamine that was given to cancer patients who are receiving treatment via radiation reported positive results. This also applied to chemotherapy-related treatments.
Supplements were given to treat neuropathy symptoms, sore throat, inflammation of the mouth and diarrhea.
Professionals offer guidelines for when to take glutamine. That is, 30 minutes before or after exercising, when you wake up and before bed.
One study has shown that muscle growth requires taking essential amino acids during the recovery period after a workout. This is the time when the rate of protein synthesis increases and amino acid is promoted into the muscles. Six grams of amino acids and 35 grams of sucrose was taken 1 or 3 hours after a workout. Compared to the sucrose drink, protein synthesis increased dramatically, with similar anabolic responses.
Researches have indicated that glutamine taken right before bed improved growth hormone levels during sleep.
When You Wake Up
An glutamine supplement taken early in the morning replenishes muscles with abundant amino acid that they need at the beginning of the day.
Frequently Asked Questions
For people that may be overweight, the body may require more glutamine than usual. If you do not have enough, the body will break down the muscle tissue for getting the amino acid it needs. You will begin to lose muscle mass.
If you are starting to take glutamine supplements, you can begin with a dose of 5 grams per day. Short-term use of glutamine is safe when combined with glutamine found in foods. However, it can have an impact in how the body processes amino acids.
For people without intestinal problems, it can take as little as 2 to 12 weeks for it to work. If you have an autoimmune inflammation, it can take around 12 to 24 to see any noticeable changes.
You can take it on off days. It is recommended to take it in 2 to 3 doses. You can take it before bedtime.
Animal proteins are high in glutamine. There are vegetables that contain glutamine. The following are the lists of foods:
Protein supplementation and glutamine are safe to take together, knowing that glutamine itself is a building block of protein. Both supplements are used by athletes to improve their recovery time and performance.
The body feel the most stress during a workout. A pre-workout or an intra-workout supplement can work best. For example: take 5 grams of glutamine with 3 grams of BCAA.