L-Citrulline vs L-Arginine

L-citrulline and l-arginine supplements are booming in the workout industry because of their vast benefits, especially in their production of nitric oxide.* Nitric oxide has been proven to get bigger gains and pumps during workouts, as well as a quicker recovery time.*

Various workout supplements include both l-citrulline and l-arginine, while others choose one or the other.

What is the difference between the two?

L-Citrulline vs. L-Arginine

First off, both are Amino Acids that the body naturally creates. They also both help to lower blood pressure and are precursors to nitric oxide.*  L-Citrulline produces L-Arginine in the Kidney while L-Arginine produces Nitric Oxide in the gut. 

L-citrulline differs from l-arginine by its ability to reduce fat levels when combined with exercise.* It not only helps to build lean muscle, but actually shrinks body fat.*

Additionally, it helps to boost and maintain energy levels during and after a workout.* L-citrulline helps to release stored energy in the muscles, called ATP (adenosine triphosphate).* That means, l-citrulline pre workout supplements help to keep your muscles and body energized even after a tough workout.

L-citrulline has also been shown that it is better used to reduce fatigue and lactic acid from the muscles after a workout.* Because it acts as a vasodilator, l-citrulline helps release nitric oxide and allow more blood to flow to the muscles.*

The clinically recommended dosage for l-citrulline pre-workout supplements is 6g per one serving in order for it to benefit the person to their maximum capacity.


L-arginine is an amino acid that helps to build and synthesize proteins in the muscles, which helps them grow and repair quickly.* After a long workout, your muscles will feel that “pump” to let you know that they got worked out.

A difference that l-arginine does is that it induces growth that help rebuild muscles and grow lean muscle quickly.*

One of the best benefits of l-arginine is that it helps to reduce cortisol,* which is released when you’re stressed. Lower cortisol levels means less stress! And who doesn’t want that?

Which Is Better For Pre-Workout?

Truthfully, both are great to have in a workout supplement since they both perform differently.

However, if you were to choose just one, l-citrulline is better proven to be more effective at producing nitric oxide with lower dosages.* L-citrulline pre-workout supplements that have 6g of the amino acid will help your body build muscle and reduce fatigue to squeeze in a harder workout.*

Bucked Up Pre-Workout by Das Labs has the perfect product for you. With 6g of l-citrulline, deer antler velvet, and AstraGin, this product isn’t going to fail you. Your muscles will be thanking you after each workout. And you’ll be thanking Bucked Up.  Shop Today! Discover the best supplements for size and strength.

Over 6 Grams of L-Citrulline per serving!