Pulse | Pre-Workout

What truly makes PULSE great is clinically effective dosages of key ingredients like citrulline malate, beta-alanine, ornithine, and betaine. This is a pre-workout like you’ve never experienced before.

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Many companies offer a money-back guarantee because they know the majority of dissatisfied customers aren’t going to go through the hassle of actually returning the product to get their money back. We don’t play these games because we don’t have to, the quality of our products makes it unnecessary.

If you order any of our supplements for the first time and don’t like it, you can keep it. Just notify us and we’ll give you a full refund on the spot. No complicated forms and no return necessary.

To protect ourselves from fraud, the It’s-On-Us guarantee is only valid for first time purchases of a product, and redeemable up to three months after purchase. If you bought more than one bottle of a supplement on your first purchase and don’t like it, we would ask that you send the unopened bottles back to us for a refund because we can put them back into our sellable inventory.

What truly makes PULSE great is clinically effective dosages of key ingredients like citrulline malate, beta-alanine, ornithine, and betaine. This is a pre-workout like you’ve never experienced before.

When we set out to create PULSE, we wanted to focus on several primary benefits: increasing energy and blood flow, reducing fatigue, improving muscular endurance, and sharpening mental focus.

We conducted an extensive scientific review of a wide variety of natural molecules known to meet those targets, and we carefully chose a handful that safely deliver consistent results.

While everyone claims to have the best pre-workout supplement on the market, we can actually back up such claim with real science, and real numbers.

First, every ingredient in PULSE has been proven effective in well-designed, well-executed peer-reviewed research conducted with healthy adults. Furthermore, each ingredient is included at the clinically effective dosages used in the studies, which means you can actually expect to receive the benefits demonstrated.

Second, PULSE doesn’t rely on a concoction of cheap and potentially dangerous stimulants to improve performance, like many other pre-workout supplements on the market. In fact, the only stimulant is caffeine and it’s combined with theanine, which means a smooth energy curve with no jitters or crash.

The real “magic” of PULSE is in its unique combination of amino acids scientifically proven to increase strength, endurance, focus, and mood.

Let’s take a look at the formulation.

Caffeine Anhydrous

Caffeine is a useful pre-workout stimulant that can increase muscle endurance and strength. [1][2][3][4][5] Clinically effective dosages vary between 3 and 6 mg per kg of bodyweight. [6]

Considering the average adult male’s weight is about 180 pounds, this is right in the middle of the clinically effective range. [7]

PULSE contains 350 mg caffeine per serving


Theanine is an amino acid found primarily in tea that, when paired with caffeine, provides several cognitive benefits. [8][9]

Research shows that supplementation with theanine and caffeine…

  • Reduces the effects of mental and physical stress [10]
  • Increases the production of nitric oxide, which improves blood flow [11]
  • Improves alertness, focus, attention, memory, mental task performance, and mood [12][13][14][15][16][17][18]

The clinically effective dosages of L-theanine in the studies cited above range from 100 to 250 mg.


Citrulline Malate

Citrulline malate is the amino acid citrulline bound with malic acid.

We chose to use citrulline malate over its often-used counterpart, L-arginine, because it’s better absorbed and results in higher plasma arginine levels than supplementation with L-arginine itself. [19]

Research shows that supplementation with citrulline…

Clinically effective dosages in the studies cited above range from 4 to 10 grams per day. [20]



Ornithine is an amino acid that, along with arginine and citrulline, plays a key role in a metabolic process known as the urea cycle. This is the process by which the liver converts ammonia into urea, which is expelled through both urine and sweat, and it impacts physical performance capacity.

Research has shown that supplementation with ornithine can:

  • Reduce fatigue in prolonged exercise. [25]
  • Promote lipid oxidation (the burning of fat for energy as opposed to carbohydrate or glycogen). [25]
  • Increase growth hormone and insulin-like growth-factor 1 production when paired with arginine. [26]
    (Remember that PULSE contains a clinically effective dose of citrulline malate, which is converted into arginine in the body.)

The clinically effective dosages in the studies cited above were 2, and 2.2 grams per day.



Beta-alanine is a naturally occurring amino acid that limits the amount of carnosine, a dipeptide, stored in the muscles. [27] As beta-alanine levels increase, so do intramuscular carnosine levels, and this provides various performance benefits. [28]

Research shows that supplementation with beta-alanine…


It’s worth noting that a common harmless side effect of beta-alanine supplementation is a mild prickling, itching, or tingling of the skin. [39] Due to the proper dosing of beta-alanine in PULSE, you’re likely to experience this.

Clinically effective dosages in the studies cited above range from 4 to 10 grams per day. [40]


Betaine, also known as trimethylglycine, is a compound found in plants like beets.

Research shows that supplementation with betaine…

  • Improves muscle endurance [40][41]
  • Increases strength [42]
  • Increases growth hormone and insulin-like growth factor 1 production in response to acute exercise [43]

The clinically effective dosages in the studies cited above range between 1.25-2.5 grams in the studies cited above.


Delicious with no artificial sweeteners, flavoring, food dyes, or fillers

While the clinically effective dosages of key ingredients alone puts PULSE light years ahead of other pre-workouts on the market, there’s still more that sets it apart: what we leave out.

PULSE is naturally sweetened. Artificial sweeteners may not be as dangerous as some people claim, studies suggest that regular consumption of artificial sweeteners may indeed be harmful to our health, and that more research is needed. [44][45][46][47][48][49]

And while artificial flavors seem to be benign, they just aren’t necessary, natural flavors taste equally good.

We've chosen to stay on the safe side and use the natural sweeteners stevia and erythritol instead. Stevia is a sweet herb in the Chrysanthemum family, and research has shown that it can:

  • Increase insulin sensitivity [50]
  • Help regulate blood glucose levels [50][51]
  • Offer anti-carcinogenic properties [52]
  • Decrease oxidative stress associated with eating large amounts of carbohydrates [52]
  • Reduce blood pressure and inflammation in the body [52]
  • Lower bad cholesterol levels [52]
  • Protect the kidneys [51][53]

And in case you’re worried that naturally sweetened means horrible tasting, you can rest easy. We’ve taken special care to ensure that PULSE tastes great, mixes well, and goes down easy.

We don’t use artificial food dyes in any of our products. Many pre-workout drinks contain artificial dyes, known as azo dyes, such as FD&C Yellow #5 (tartrazine), FD&C Blue #1 (Brilliant Blue), FD&C Red No. 40 (Allura Red AC), and others.

Like artificial sweeteners, consumption of azo dyes might not be as harmful as some claim, but there is evidence that these chemicals can cause various negative effects in the body. [54][55][56][57][58][59][60][61][62][63][64]

PULSE contains absolutely no “label stuffing” ingredients. We have a simple standard that we live by: every active ingredient used in LEGION products must be backed by published scientific literature and must be integrated at clinically effective dosages.

PULSE isn’t full of cheap carbohydrate powder to give you a kick of energy. While eating carbohydrates before training is an easy way to increase your performance, a pre-workout drink shouldn’t rely on this. You’re not looking to buy overpriced carbohydrate powder.

That’s why PULSE contains only the bare minimum of maltodextrin necessary for taste (some amino acids are very bitter), mixability, and anti-clumping — less than 2 grams per serving. Compare this to the nearly 20 grams of properly dosed active ingredients you’re getting per serving, and you can see how little maltodextrin is actually needed in a properly formulated pre-workout drink.

The Bottom Line

When you start comparing actual numbers, you can quickly see that one scoop of PULSE — ½ of a serving — contains about double the effective ingredients of our best competitors.

And a full serving, which provides you with clinically effective dosages, is double that. While everyone claims to have the best products on the market, we believe we can actually back up such a claim with real science and real numbers.

Compare the PULSE formulation to any other pre-workout drink on the market, and it’s easy to see how inferior our competitors’ products truly are.

If you want to know what a pre-workout is supposed to feel like…if you want to experience the type of energy rush and performance boost that only clinically effective dosages of scientifically validated ingredients can deliver…if you want to avoid any potential issues arising from regular intake of artificial sweeteners and food dyes…then you need to try PULSE.

Frequently Asked Questions

How does PULSE compare to other popular pre-workouts?
What type of workouts is PULSE good for?
Why doesn’t PULSE have creatine?
PULSE only has 6 ingredients. Other pre-workouts have 10, 15, and some even more. What gives?
Is PULSE suitable for women?
PULSE is kind of expensive. Why should I buy it over cheaper alternatives?
What does “clinically effective dosages” mean, anyway? Isn’t it just marketing lingo?
Will PULSE stimulate nitric oxide production?
What type of citrulline malate is in PULSE?
How do I know you’re not selling bottles of fillers like other supplement companies have been caught doing?
Are there any side effects I should know about?
Why is there maltodextrin in PULSE?
PULSE is too sweet/strong tasting for me. What should I do?
My bottle of PULSE has gotten slightly clumpy. Is it bad?
PULSE has calories. Will this break my fast?
How does PULSE have 4 grams of carbs per serving but only 5 calories?
Will I build a tolerance to PULSE? If so, can I do anything to prevent this?
How many servings of PULSE can I take in one day?
Is PULSE gluten-free?
Is PULSE vegetarian friendly?
Is PULSE vegan friendly?

Ingredients & Use

  • Fruit Punch
  • Grape
  • Green Apple
  • Watermelon
Pulse Supplement Facts


If this is your first time using PULSE, assess your individual tolerance by mixing 1 scoop with 10-12 ounces of water and consuming 15-30 minutes prior to exercise. If you experience any non-optimum effects, stop and consult your doctor. We recommend using 1 scoop 15-30 minutes prior to weight training or intense cardio, or 2 scoops (full clinical dosages) for intense weight training or cardio lasting longer than 45 minutes.


Not intended for persons under the age of 18. Do not use if pregnant or nursing. Consult a health care professional prior to consumption if you have any pre-existing medical conditions or are taking any prescription medication. Improper use of this product will not improve results and is potentially hazardous to a person's health. Use only as directed.

Pulse Supplement Facts


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