10 Best L-Arginine 1340mg Capsules of December 2025

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• Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery

Now Foods

• Arginine is one of 20 amino acids, the building blocks of protein
• Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery
• Arginine can serve as a source of energy, and is involved in various pathways throughout the body
• Arginine supports the effect of exercise and is one of the most important amino acids involved in immune function
• Fitness Type: Post Workout

Puritan's Pride

• DOUBLE STRENGTH L-ARGININE: NOW offers this non-GMO, double strength L-Arginine supplement in 1,000 mg tablets.
• Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery
• NITRIC OXIDE PRECURSOR*: Arginine plays an important role in the dilation of blood vessels.*
• CLASSIFICATIONS/CERTIFICATIONS: Non-GMO, Kosher, Soy Free
• GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).
• Packaged in the USA by a family owned and operated company since 1968.

NOW

• HEART HEALTH: L-Arginine and L-citrulline boost nitric oxide production in the body. Nitric oxide helps your arteries relax and work better, which improves blood flow and increase oxygen supply throughout your body which also plays a vital role in increasing your stamina
• SUITABLE FOR BOTH MEN AND WOMEN: L-arginine is feasible for both men and women, especially when it comes to workout, everyone wants an increase in blood flow during workouts to increase muscle pumps AND achieve maximum results
• PERFORMANCE AND VASCULARITY: Arginine is perfect for weightlifters, athletes and gym buddies as it allows your body to use accumulated fats which are burnt to produce energy and to aid in muscle mass formation and development.
• ADDED NIACIN: Niacin is a B vitamin that's used by your body to turn food into energy. It helps keeping your nervous system, digestive system and skin healthy
• PURE IMPACT NUTRITION: Our L-Arginine is formulated and manufactured in the USA in a facility in which compliance to international GMP standards is strictly monitored. We are conscientious and make sure that every bottle is being inspected thoroughly before sending to you because your satisfaction is utmost important to us

Pure Impact Nutrition

• Arginine Plus Cofactors: Antioxidants and methylating factors augment arginine benefits*
• Sustained Release: Provides optimal levels of L-arginine with twice-daily dosing
• Circulation: Helps to relax arteries, thus promoting optimal blood flow*
• For Athletes: Supports lean muscle mass and work capacity during exercise*
• Free From: Every Thorne product is made with the purest possible ingredients - without gluten or other major allergens (eggs, tree nuts, peanuts). This product also contains no soy, dairy, yeast, shellfish, or fish.

Thorne Research

• NOW Sports products are comprehensively tested so you can trust that our products are pure and effective for every level of athletics.
• Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery
• PROTEIN METABOLISM*: Arginine and citrulline are two amino acids that are integral to protein metabolism and utilization, as well as to the maintenance of muscle tissue.*
• NITRIC OXIDE PRECUSOR*/PRE-WORKOUT SUPPLEMENT: Take one capsule up to twice a day, preferably before working out.
• GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).
• Packaged in the USA by a family owned and operated company since 1968.

NOW

• ELITE AMINOS: This molecule contains fundamental building blocks for daily protein synthesis*
• POTENT SOURCE: Horbaach's Extra Strength L-Arginine HCL is concentrated with 4000 mg per serving!
• PREMIUM FORMULA: Our Premium Formula is derived from the purest free form Amino Acid
• HORBAACH MANUFACTURERS: Laboratory Tested, Trusted Ingredients, Superior Quality, 100% Guaranteed!
• NATURALLY FREE OF: Gluten, Wheat, Yeast, Milk, Lactose, Soy, Artificial Color & Flavoring & NON-GMO

Horbäach

• Maximum dose L Arginine - L-Arginine Tablets provide the highest dose of l arginine powder in capsule form with 3000mg of pure l-arginine in each serving and a 50 day supply.
• Support for healthier circulation, stamina and energy. Not only is Arginine believed to support blood flow and muscle growth, but it is also a popular supplement for supporting energy production, stamina, and vascular function making it an ideal supplement for men and women of diverse activity levels.*
• Used by many for bigger pumps and nitric oxide production. 3000mg of L Arginine provide a powerful precursor to Nitric Oxide production in the body which means more blood flow to the muscles. More blood flow can result in support for a bigger, stronger, and longer pump.*
• Lab-Tested, Certified Organic GMP - Zeal Naturals uses only the highest-quality, thoroughly-tested ingredients in their products. All of the products are manufactured in a facility following GMP guidelines. The products are then 3rd party Lab-Tested to assure the quality of the ingredients.
• Also known as: workout supplements for men, nitric oxide supplements for men, muscle building supplements for men, l-arginine 1000 mg, nitrous oxide supplements.*

Zeal Naturals

• Maximum Strength Nitric Oxide: Make your best performance yet with the premium l arginine supplement from jp4. Formulated with the l-arginine (hydrochloride) and AAKG (arginine alpha-ketoglutarate), these capsules naturally boosts the production of nitric oxide helping you improve your energy, endurance, vascularity and muscle recovery thereby allowing you to train harder and longer
• High L-Arginine Capsule Dose: Providing 1340 mg in every serving, you give your body more off the most metabolically versatile amino acid so your body can perform at its best, at its healthiest. With these essential amino acids abundant in your body, be able to easily fight fatigue while keeping your body at its optimum health.
• Arginine Capsules for Both Men and Women: Be not mistaken that L-Arginine supplement pills are just for men. Women will equally benefit from them too. Besides being a great supplement that'll help you workout better and thereby get that dream physique in no time, taking l argine capsules daily will bring about amazing things for women's health too just like the production of glutamate and glutamine, antioxidants that are vital for collagen production and immune function.
• Pure and Potent L Arginine Supplement Formulated in the USA: When choosing any dietary supplement, and not just your NO booster, it is important to take note where it came from, what's it made of or how it's made. With the jp4 Arginine, be at peace knowing that every capsule taken is indeed easy-to-swallow, has no bitter taste, is non-GMO, has no sugar, no preservatives, and is manufactured under the highest industry regulations in a GMP-certified facility.
• jp4 L-Arginine Capsules Specially Made for You: Your health and wellness is strictly of utmost importance. That is why here at jp4, we make sure that every bottle of our L-Arginine Supplement is meticulously inspected before packing and sending to your doorstep. And because we stand by the quality of arginine capsules, please do reach out to us anytime you have concerns with your purchase. Your satisfaction is our happiness.
• Safety warning: Do not exceed recommended dose. Pregnant or nursing mothers, children under the age of 18, and individuals with a known medical condition should consult a physician before using this or any dietary supplement.
• Directions: As a dietary supplement, take two(2) capsules once a day. For best results, take 20-30 minutes before a meal with an 8oz glass of water or as directed by your healthcare professional.
• Allergen information: gluten_free
• Ingredients: L-Arginine(Base), l-Arginine AKG, L-Citrulline HCL, L-Citrulline Malate Extract, Beta Alanine

JP4

• Heart health; add L-Arginine to your daily exercise for better heart health; aging and unhealthy lifestyles frequently cause reduced blood circulation; when taken daily especially during exercise, nitric oxide is released into the blood vessels, causing them to expand and improve blood flow throughout the body, reducing your heart muscle’s burden
• Extra strength L Arginine; combining the power duo of amino acid Arginine Alpha Ketoglutrate (AKG) with Citrulline, plus Niacin and Calcium; this super charged formula packs the 5 optimal Nitric Oxide ingredients for heart health
• Promoted lean muscle; L Arginine is an essential amino acid that converts into Nitric Oxide, which relaxes blood vessels and boosts blood circulation; expanded blood vessels pump more oxygen to your muscles, increasing your endurance
• Better workouts, stronger pumps; increase energy and stamina, improve recovery time; recommended for bodybuilders, athletes, competitive sports and regular active people
• Reliable; made in a GMP certified facility in America and third party safety tested for purity

Arazo Nutrition