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L-arginine is an amino acid that performs a key function in your physique’s regulation of blood circulate due to its means to extend nitric oxide manufacturing. It’s additionally discovered in lots of pre-workout mixes, and it might probably assist improve each bodily and sexual efficiency.

L-arginine has been used successfully for every thing from bettering coronary heart operate to growing reminiscence to treating erectile dysfunction. Because the operate of just about every thing in your physique relies upon critically on its blood provide, that is no small matter.

Right here’s our research-backed rankings of the ten greatest L-arginine dietary supplements available on the market.


Final up to date: January 4, 2023
L-arginine dietary supplements thought of: 29
Hours of analysis: 38
Specialists reviewed: 5
Scientific papers referenced: 11

1. L-Arginine PURE

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L-Arginine PURE delivers a excessive dose of L-arginine, and it does so with a extremely pure formulation with a number of types of L-arginine.

Most of its 700 mg of L-arginine per capsule is delivered as arginine alpha-ketoglutarate, however it additionally contains small quantities of free L-arginine, L-arginine L-pyroglutamate, and L-arginine HCL.

Since these are absorbed by barely totally different pathways in your physique, this would possibly increase absorption and result in arginine ranges that enhance quickly and keep elevated for a very long time.

These options make it nice for reinforcing your intercourse drive in addition to athletic efficiency, and this versatility earns it our high spot.

2. Havasu Diet L-Arginine

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Havasu’s L-arginine complement delivers 400 mg of arginine per capsule, break up between L-arginine HCL and L-arginine alpha-ketoglutarate.

As well as, it gives the companion amino acid citrulline, which can be linked to nitric oxide manufacturing within the physique, and beet root extract, which additional enhances nitric oxide manufacturing. In case you are in search of maximal blood circulate, it’s an amazing answer.

3. BulkSupplements L-Arginine

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For the true do it yourselfer, BulkSupplements L-arginine is the best way to go. Coming in a pure powdered type of L-arginine HCL (which is what the “base” within the title refers to), that is what you need in case you are in search of a option to incorporate L-arginine into your shakes or smoothies.

The draw back is shared with all powder-based dietary supplements which are often taken in low doses: you’ll want a milligram-accurate scale to measure out doses.

4. Jarrow Formulation Arginine-Citrulline Maintain

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Jarrow Formulation by no means goes for flashy complement formulations, however they do easy formulation fairly properly. That is the case with their L-arginine complement, which is a combo of L-arginine and citrulline malate a vegetarian capsule.

It’s licensed freed from widespread allergens like gluten, soy, dairy, shellfish, and eggs, making it a good selection for individuals with meals sensitivities and allergy symptoms.

5. NOW Double Energy L-Arginine

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NOW delivers a heavy dose of L-arginine, with 1000 mg of L-arginine HCL per capsule.

Sadly, it’s received a couple of extra binders and stabilizers than purists would possibly like, and one other drawback is the truth that the L-arginine is provided in only one type versus a number of totally different types.

Nonetheless, for these in search of excessive L-arginine dosages, it’s an excellent purchase.

6. Dorado L-Arginine

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Dorado Diet makes an L-arginine complement that’s full of 4 totally different types of L-arginine.

That is good to see from a bioavailability perspective, however the formulation would profit extra from different nitric oxide boosters, and the next total dose (regardless of the number of components, every capsule solely has 800 mg of L-arginine whole).

7. L-Arginine PRO Powder

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This powder-based L-arginine complement is one thing a little bit totally different–it’s nearly extra of a sports activities drink than only a complement. It gives a really excessive dose (5500 mg) of L-arginine, alongside nutritional vitamins C, D, Ok, and a number of other B-vitamins.

It’s flavored with stevia together with the substitute sweetener xylitol, which some individuals might not like. The style and flavoring would possibly make it a little bit too overpowering so as to add to a smoothie or a protein shake, which limits its versatility.

8. Goliath by Dr. Emil Arginine Plus

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Dr. Emil makes a complement that gives dual-form L-arginine (each the AKG type and the HCl type), plus citrulline for added nitric oxide energy.

Nevertheless, it’s fairly thick with components and binders, which places it under lots of the different multi-ingredient arginine-based nitric oxide boosters.

9. Superb Formulation L-Arginine

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At 1000 mg per capsule, Superb Formulation has a high-potency L-arginine complement, however apart from that, there’s not a complete lot going for this complement.

With a number of extra binders, the L-arginine comes solely in an L-arginine HCL type. Maybe higher than free L-arginine, however less than the requirements of among the high ranked dietary supplements.

10. Bestvite L-Arginine

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The L-arginine complement from Bestvite is excessive dosage and no frills. It comes within the “free” type, which is reasonable to fabricate however is probably not as readily absorbed by your physique as an alpha-ketoglutarate and even an HCL type of L-arginine.

Additional, the capsule is stabilized by plenty of binders and fillers, that are a little bit of a turn-off. The 1000 mg dosage is the one upside to this L-arginine complement.

Class winners

Finest L-arginine total: Pure Label L-Arginine

Delivering a potent and extremely bioavailable dose of L-arginine, Pure Label is our total winner because of its clear complement design and supply. If you happen to’re in search of the perfect arginine-only complement on the market, select Pure Label L-Arginine.

Finest L-arginine for erectile dysfunction and sexual efficiency: Havasu L-Arginine

In case you are sad along with your sexual efficiency, low ranges of nitric oxide may be responsible. Havasu L-Arginine delivers an arginine/citrulline combo that helps increase arousal and erectile operate because of its multi-ingredient method to up-regulating your physique’s manufacturing of nitric oxide.

Finest L-arginine for coronary heart well being and blood stress: Pure Label L-Arginine

For coronary heart well being, you need to maintain issues easy: Pure Label L-Arginine delivers over 700 mg of L-arginine per capsule, break up throughout three totally different types for max absorption. If you happen to’re trying to emulate analysis that’s used L-arginine to regulate blood stress, Pure Label is the best way to go. 

Finest L-arginine for protein shakes: BulkSupplements L-Arginine

Need to add some nitric oxide powder to your customized pre-workout or restoration shake? BulkSupplements is the best way to go. You get extremely pure L-arginine which you can dial in to the optimum dose, irrespective of your use case.

Finest L-arginine for weight reduction: Havasu Diet L-Arginine

Havasu Diet L-Arginine pairs the nitric oxide boosting capabilities of L-arginine with widely-known nitric oxide boosters present in beet root extract. These components work together to enhance your physique’s means to course of carbs, which is a large assist when making an attempt to drop a few pounds. 

Finest L-arginine for reinforcing nitric oxide: Pure Label L-Arginine

Pule Label contains a number of types of L-arginine to speed up your physique’s nitric oxide manufacturing. It ought to come as no shock that our high total choose can be an amazing selection for reinforcing nitric oxide, whether or not your targets are athletic efficiency, sexual efficiency, or long-term well being.

Who can purchase L-arginine?

L-arginine has three main makes use of: bettering exercise efficiency and restoration, bettering cardiovascular well being, and bettering sexual wellness, notably in males. Right here’s why:

Bettering bodily efficiency. L-arginine helps your physique produce nitric oxide, which will increase blood provide to your muscular tissues by dilating your blood vessels. As well as, it shifts your carbohydrate metabolism in order that your physique can replenish muscle glycogen extra readily following an intense exercise.

Some analysis means that L-arginine can also can enhance most anaerobic energy manufacturing and one-rep max, in all probability by growing muscular operate.

Supporting cardiovascular well being. On the well being entrance, L-arginine helps lower blood stress by the identical nitric oxide upregulation mechanism that enhances efficiency.

It additionally helps enhance your physique’s means to course of carbohydrates, which turns into impaired in metabolic syndrome and in people who find themselves chubby or overweight, and is an unbiased danger issue for coronary heart illness.

Boosting sexual operate. Since L-arginine modulates nitric oxide manufacturing, it’s additionally been used efficiently as a remedy for erectile dysfunction. Some (although not all) circumstances of erectile dysfunction may be linked to a deficit of nitric oxide ranges, and L-arginine seems to assist in these circumstances.

So, by a couple of comparable mechanisms, L-arginine is helpful for individuals who need to enhance their health, their athletic efficiency, and their sexual well being.

Moreover, it additionally can assist individuals who wish to lower their danger components for coronary heart illness.

How we ranked

We examined L-arginine dietary supplements in addition to nitric oxide dietary supplements that used L-arginine in a central function alongside different compounds like citrulline to extend nitric oxide ranges. Right here’s what we evaluated dietary supplements on:

Excessive dosage and efficient formulation. In the case of L-arginine, efficacy and dosage are king. 

We checked out each classes as a result of individuals trying to observe the scientific analysis as intently as potential possible need pure, unadulterated L-arginine, however individuals who take a extra holistic method to supplementation might need to benefit from synergies between L-arginine and different components concerned within the synthesis of nitric oxide within the physique.

Synergistic components that upregulate nitric oxide pathways. Plenty of associated compounds are used within the organic pathway that L-arginine prompts, and supplying these compounds alongside L-arginine might properly enhance the efficacy of a given dose of L-arginine.

Purity mattered for L-arginine-only dietary supplements. When analyzing pure arginine dietary supplements, we put a excessive precedence on purity.

Any extra components, even binders or bulking brokers, detracted from our scores, and plenty of dietary supplements didn’t even make our record as a result of they have been so crowded with pointless components.

Streamlined design for synergistic nitric oxide boosters. A clear and streamlined complement design knowledgeable our scores of the L-arginine primarily based nitric oxide dietary supplements.

We required that the extra holistic complement design not compromise the L-arginine dosage, and dropped something that didn’t ship an ample quantity of L-arginine (sufficient to be efficient primarily based on scientific analysis utilizing L-arginine solely).

Proof-based supporting components. Subsequent, we checked to see if the opposite components offered alongside L-arginine had sturdy scientific proof supporting their efficacy.

If not, we eradicated that complement from our rankings—a nitric complement that gives ineffective components isn’t any higher than a fundamental L-arginine complement, and is much less pure.

The merchandise that made the ultimate minimize characterize the perfect of each pure L-arginine merchandise and nitric oxide dietary supplements that present a hefty and efficacious dose of L-arginine.


Q: What’s L-arginine?

A: L-arginine, generally additionally identified merely as arginine, is an amino acid that’s used as a constructing block for a lot of totally different sorts of proteins in your physique.

It may be present in protein-rich meals, each plant and animal-based, and it additionally performs an vital function in regulating your physique’s manufacturing of nitric oxide.

Nitric oxide will increase blood circulate and oxygen provide, which explains why L-arginine is a well-liked pre-workout complement, however this blood circulate profit additionally explains L-arginine’s functions for sexual efficiency and cognitive operate.

Q: How do you have to take L-arginine?

A: L-arginine must be taken at a reasonably excessive dose, between three and eight grams per day relying in your physique measurement.

It’s not clear whether or not you need to take this dosage unexpectedly, or unfold it all through the day—there hasn’t been sufficient analysis evaluating these totally different dosing protocols.

In case you are trying to increase your restoration after a troublesome exercise, although, you need to undoubtedly take your L-arginine dose unexpectedly, and mix it with one gram of carbohydrates per kilogram of physique mass (or half a gram of carbs per pound of physique weight, roughly).

Q: Is it higher to take a pure L-arginine complement or a mix?

A: Opinions are blended on the advantages of pure L-arginine versus combo dietary supplements. On one hand, most scientific analysis has targeted on L-arginine alone.

On the opposite, there are some papers suggesting that L-arginine is only when mixed with different compounds within the nitric oxide synthesis pathway, like citrulline or different amino acids.

Associated articles


By upregulating your physique’s nitric oxide manufacturing, L-arginine can decrease blood stress, improve bodily stamina, and enhance sexual efficiency.

Whether or not it’s useful to take L-arginine alongside different nitric oxide boosters like beet dietary supplements stays an open query. Nonetheless, L-arginine is an effective guess for each boosting athletic efficiency and decreasing blood stress.

For BodyNutrition‘s #1 L-arginine suggestion, click on right here.



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