L-Arginine 500 mg – Nitric Oxide, Blood Flow, Physical Performance and Muscle Recovery

L-Arginine 500 mg, Now Foods, provides L-arginine in free form – a conditionally essential amino acid, known as direct precursor of nitric oxide (NO). Through its central role in supporting endothelial vasodilation, L-arginine contributes to efficient blood flow, delivery of nutrients and oxygen to tissues and physical effort comfort. Each serving offers L-Arginine (free form) 1 g (1,000 mg), in a convenient format to integrate into daily routine oriented towards energy, endurance and recovery. In addition, L-arginine participates in the urea cycle – the physiological process of ammonia neutralization – and supports protein synthesis and tissue trophicity.

Detailed benefits of L-Arginine – integrated support for circulation, energy and recovery

• Nitric oxide (NO) and endothelial function

Nitric oxide is a key mediator of vascular relaxation, produced endogenously from L-arginine with the help of NO-synthase enzymes. By increasing substrate availability, L-arginine supports NO production, promoting a balanced vasodilator response:
✅ Support for efficient blood flow to muscles and organs
✅ Contribution to tissue perfusion and oxygen/nutrient delivery
✅ Support for cardiovascular comfort in daily life

• Physical performance and perceived "muscle pump"

During effort, vessels that feed active muscles dilate to support increased oxygen consumption. Through its role in NO production, L-arginine:
✅ Promotes the sensation of "muscle pump" and effort comfort
✅ Supports endurance in workouts or prolonged activities
✅ Contributes to rapid nutrient distribution for energy support

• Muscle recovery and metabolic clarity

After effort, the body needs to replenish energy stores and eliminate metabolic products. L-arginine supports the urea cycle – the mechanism by which ammonia is converted to urea for elimination:
✅ Contributes to neutralizing ammonia resulting from protein metabolism
✅ Promotes the sensation of metabolic "clarity" post-effort
✅ Supports rapid resumption of active rhythm

• Support for protein synthesis and tissue trophicity

As an amino acid, L-arginine enters protein composition and influences anabolic pathways relevant to tissues with increased turnover:
✅ Supports muscle recovery and maintenance processes
✅ Contributes to connective tissue trophicity
✅ Promotes balance between effort and recovery

• Vascular comfort and microcirculation

A balanced endothelial response means efficient microcirculation and adequate blood distribution to active areas:
✅ Support for circulatory comfort in daily activities
✅ Contribution to more efficient thermoregulation during effort
✅ Support for sensation of ease when walking or prolonged standing

• Focus and perceived energy

Better tissue perfusion also means optimal oxygenation for brain and muscles, which can translate into mental clarity and tone:
✅ Support for concentration during demanding periods
✅ Perception of stable energy throughout the day
✅ Psychophysiological comfort in prolonged tasks

• Metabolic balance – role in urea cycle

Arginine is a metabolic "pivot" that facilitates the transformation of ammonia into urea:
✅ Contributes to maintaining an internal environment favorable to performance
✅ Supports body resilience to successive workouts
✅ Promotes adaptation to increased work volume

• Synergies with other nutrients for effort

L-arginine works complementarily with other performance-oriented ingredients:
– Citrulline: precursor that can further increase plasma arginine;
– Electrolytes (e.g., potassium, magnesium): support muscle contraction and hydration;
– Antioxidants (vitamin C, E): support cellular protection during effort.
This metabolic collaboration potentiates a more complete profile of effort and recovery support.

• Who is L-Arginine useful for

L-Arginine 500 mg may be suitable for people who:
✅ Desire to support efficient blood flow and balanced vascular response
✅ Seek comfort and perceived "pump" in workouts
✅ Want metabolic support for recovery and clarity after effort
✅ Desire a versatile amino acid, integratable in performance and wellness routines

• Integration into lifestyle

The approach to performance and circulatory comfort is multifactorial:
✅ Adequate hydration and electrolyte intake for efficient muscle contraction
✅ Progressive training (resistance and mobility) for functional adaptations
✅ Sleep and nutrition that support recovery: quality proteins, complex carbohydrates, healthy fats
L-arginine complements these pillars, helping to support perfusion, oxygenation and metabolic dynamics in effort and recovery.

• The "from vasodilation to function" philosophy

When the endothelial response is supported, perfusion of active tissues is optimized, and oxygen/nutrient delivery becomes more efficient. This internal "logistics" is felt in:
✅ Sensation of efficiency in repetitions and intervals
✅ Comfort in moderate endurance activities
✅ More coherent recovery between sessions
 

L-Arginine 500 mg, Now Foods, is a choice oriented towards functional results: supporting nitric oxide production for endothelial vasodilation, balanced blood flow and efficient resource delivery to muscles and organs. Beyond the gym, support for the urea cycle and protein synthesis makes L-arginine a versatile metabolic tool, suitable for those who desire performance, recovery and a well-calibrated energy state in daily routine.




 

Directions for Use

Take two capsules twice daily, as needed. Take between meals or at bedtime with at least 250ml of water or juice to facilitate absorption.




 

Other Ingredients

Hypromellose (cellulose capsule), stearic acid (vegetable source) and silicon dioxide.
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
The L-Arginine used in this product is pharmaceutical grade.

Warnings

Natural color variation may occur in this product.
Store in a cool, dry place after opening.
Caution: Take this product with at least 250 ml of water or juice. For adults only. Not intended for pregnant or nursing women. Consult physician if taking medication (especially antihypertensives, anticoagulants and antidiabetic medications), have a medical condition (especially asthma or kidney disease) or are planning to have surgery. This product should be avoided by people with glaucoma or herpes simplex unless otherwise prescribed by a physician. Do not use if you have had a myocardial infarction or have been diagnosed with coronary heart disease. Keep out of reach of children.