The most abundant amino acid in the human body, shown to boost aerobic performance, promote a healthy gut, and help reaction time.

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Performance Nutrition

Glutamine (L-Glutamine) is the most abundant amino acid in the human body. It makes up 61% of your muscles' amino acid pool, and your body uses and depletes it rapidly — especially in active individuals who work out or play sports.

Being that L-Glutamine is essential in minimizing muscle breakdown, supporting endurance, smoothing digestion, and enhancing nutrient absorption; we have to ensure our L-Glutamine reservoirs are nice and topped off. That is difficult to do by simply eating amino-rich foods, which is why supplementing with L-Glutamine can be so essential.†


Support Muscle & Gut Health

Minimize Muscle



Athlete Training Athlete Carrying Weights Athlete Recovering
Dairy Free, Soy Free, Vegan

Glutamine Works

The Mightiest Amino

Glutamine’s impact can be felt before, during, and after exercise.

A 2015 study found that athletes taking glutamine prior to long distance running experienced less intestinal permeability, which ultimately aided in the suppression of inflammatory pathways.†

And even with insufficient water balance, athletes have experienced boosts in aerobic endurance, as glutamine can act as a fuel source for cells.†

Glutamine Tub

Glutamine can also assist with reaction time, with one study showing how basketball players out-shot a control group by over 12%. It also was found to lower muscle soreness, speeding up recovery from weight training, and even promoting immune health.†

No matter how hard you hit it, glutamine can get you back in the game faster and keep you there longer.

Female athelete climbing wall Athlete climbing rope Athletes Stretching

Success is inevitable with solid nutrition

When you put in the work and pay attention to the details, seeing the results you want becomes not a question of if but when. It's just a waiting game. Because when your foundation is strong, adversity doesn't shake it—it merely becomes more brick and mortar to build with. Glutamine is a cornerstone in an athlete's supplementation, supporting gut health, performance, and recovery.†

The best in performance nutrition partnered with the best in athletic performance.

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Glutamine Tub
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Informed Sport Certified

Onnit is committed to the highest standards of quality and efficacy. We have already had many of our products independently certified to be competition safe, and we're actively pursuing even more certifications.

Informed Sport is a third-party testing program developed by the world-class anti-doping laboratory, LGC. It is widely regarded as the global gold standard for banned-substances testing in sports nutrition products. Each lot of Onnit products bearing the Informed Sport logo has been rigorously tested for banned substances by the Informed Sport program before it is released for sale.

Glutamine Ingredients & Use

Glutamine is rated 4.9 out of 5 by 25.
Rated 5 out of 5 by from The one and only. Very easy to drink, and it is pretty much flavorless.
Date published: 2020-05-22
Rated 5 out of 5 by from highly recommend definitely felt like I had a quicker recovery time between workouts and even set for set!
Date published: 2020-05-21
Rated 5 out of 5 by from Effective Have been taking the Glutamine with Creatine and Mineral Electrolytes about an hour before working out and definitely have noticed an uptick in endurance, reps, etc. Was previously not taking any of the three and there has been a marked improvement in capability since introducing this concoction.
Date published: 2020-05-07
Rated 5 out of 5 by from An Onnit Staple This is one of my Onnit staples. I always have it in my cabinet. Hard to track its effectiveness but what I can say is that when I have a lapse in supply, I definitely feel the difference in performance and recovery without it.
Date published: 2020-03-30
Rated 5 out of 5 by from Not disappointed So far i like it have one scoop a day fell pretty good feel better
Date published: 2020-03-14
Rated 5 out of 5 by from This stuff is awesome. I’m a climber. This stuff really makes the difference in my work outs. I’m able to push harder and climb longer. Little to no recovery after. Love it. I pair it with creatine as a pre work out.
Date published: 2020-03-08
Rated 5 out of 5 by from Put in anything! I love that it’s flavorless because I can mix it with EVERYTHING!
Date published: 2020-03-05
Rated 5 out of 5 by from Best stuff for soreness when getting back to it Really helps after a brutal workout. Hadn't worked out for a while thanks to an injury. When I went back to it, I knew I'd be sore the next day, but I took some of this after the workout and felt great the next day! No soreness or awkward moments trying to get off the toilet. The Onnit team is very responsive, had the wrong item mailed, and they sent the correct one withing 2days. The return process was also very easy and convenient.
Date published: 2019-12-05
Rated 5 out of 5 by from Excellent! Great support to your regular work outs! Highly recommend it!
Date published: 2019-09-25
Rated 5 out of 5 by from Blends very well Great product, seems to be completely clean. The only problem with a clean product is taste, but it’s definitey bearable.
Date published: 2019-04-23
Rated 5 out of 5 by from Effective I decided to start taking this for the first time and it has been great very effective and noticing how I feel after my training with less sorness recovery is so much better. Love it. Glad I made the right choice.
Date published: 2019-01-01
Rated 5 out of 5 by from Smell/ taste is minimal, works well Intake this once a day with cold water to top off and I feel like I'm back in it. Nothing over the top or stimulating. Just replenishes which is what it's for.
Date published: 2018-11-29
Rated 5 out of 5 by from Life saver This may not taste the greatest but by god it does what it's suppose to. This is critical for my recoveries to get me back in the gym quickly.
Date published: 2018-09-04
Rated 5 out of 5 by from Awesome I love it! I mix this with my Whey Protein, love the quality, love the value, love the snazzy packaging, keep up the awesome work Onnit! :)
Date published: 2018-07-05
Rated 4 out of 5 by from Maybe I guess it’s good. I have no idea if it working. I assume it is.
Date published: 2019-08-29
Rated 4 out of 5 by from 4 1/2 stars No taste but you can feel the effects that this glutamine has on restoring your muscle and body
Date published: 2019-07-14
Rated 4 out of 5 by from Well made product I bought the glutamine for a self experiment during a hard block of cycling. I was very impressed at how easily the powder resolves and mixes in even with a small amount of liquid. I used 2 scoops in about 1oz of coffee and it dissolved completely with just a little swirl of the cup. I think the price point is very fair. The taste leaves something to be desired BUT, at least it’s not packed full of sugar to make it taste good.
Date published: 2019-02-11
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