Arginine & Citrulline: Nitric Oxide, Circulation and Muscle Pump, Exercise Performance and Cardiovascular Support – L-Arginine 500 mg + L-Citrulline 250 mg

Arginine & Citrulline, NOW Foods is a dietary supplement formulated to support nitric oxide (NO) production, an essential biological messenger for blood vessel relaxation, efficient circulation and optimal delivery of oxygen and nutrients to tissues. The formula combines two amino acids in free forms, easily utilized by the body: L-Arginine 500 mg and L-Citrulline 250 mg, an association known for its synergy in supporting endothelial function, physical performance and exercise endurance.

In the body, L-arginine is a direct precursor for nitric oxide synthesis through enzymes called nitric oxide synthases (NOS). Nitric oxide contributes to maintaining normal vascular tone, helping vessels dilate when increased flow is needed, as occurs during physical effort or periods of metabolic stress. L-citrulline perfectly complements this mechanism, as it can be converted to arginine in the body, contributing to maintaining arginine availability for a longer term. Thus, the arginine + citrulline combination can support a more stable dynamic of NO production, with impact on circulation, energy, endurance and recovery.

Efficient circulation is a central piece of the state of vitality: it influences how muscles respond to training, how energy feels during the day, how quickly tissues can recover and how well the body can manage cardiovascular demands. At the same time, nitric oxide is involved in numerous regulatory processes, including cellular communication, adaptation to effort and maintenance of physiological functions dependent on blood flow.

Through this formula, Arginine & Citrulline, NOW Foods addresses people who wish to support their physical performance, muscle pump, endurance and circulation, but also those interested in modern metabolic and cardiovascular support, based on amino acids directly used in the body's physiological pathways.

Detailed Benefits of Arginine & Citrulline (L-Arginine + L-Citrulline)

• Support for Nitric Oxide Production and Efficient Circulation

Nitric oxide is one of the most important factors supporting physiological vasodilation, meaning the ability of blood vessels to relax and allow better blood flow. When blood flow is optimal, tissues more easily receive oxygen, glucose, amino acids and micronutrients necessary for energy and recovery.

When circulation is not sufficiently supported, the following may appear:
• sensation of "low energy" during the day
• fatigue during effort, even moderate
• sensation of "heavy legs" or slower recovery

Through the supply of arginine and citrulline, the body can benefit from:
✅ support for nitric oxide synthesis
✅ more efficient blood flow to muscles and organs
✅ support for vitality through optimal tissue perfusion

• Improvement of Exercise Performance and Muscle "Pump"

During physical activity, muscles need increased blood supply to receive oxygen and eliminate metabolites resulting from effort. An adequate NO level can improve vascular response to training, and this translates into the sensation of muscle "pump" and better capacity to sustain intensity.

The arginine + citrulline combination can contribute to:
✅ increased comfort during effort through improved circulation
✅ support for endurance and working muscle capacity
✅ better muscle response to strength or endurance training

This makes the product relevant both for athletes and for active people who desire functional support in training.

• Support for Endothelial Function and Vascular Health

The endothelium is the inner layer of blood vessels, responsible for regulating vascular tone, vascular inflammation and circulatory balance. Nitric oxide production is one of the key functions of the endothelium. By supporting the necessary substrate (arginine) and prolonged availability (through citrulline), the formula can contribute to maintaining a normal vascular response.

Functional benefits:
✅ support for physiological vascular elasticity
✅ support for peripheral circulation
✅ support for vascular adaptation during effort and stress

• Energy and Endurance Through Efficient Oxygen Delivery

Energy depends not only on mitochondria and nutrients, but also on how well oxygen and fuel reach the cells. Efficient circulation supports aerobic function and can reduce the sensation of exhaustion during effort. In this sense, nitric oxide acts as a "regulator" of blood flow distribution according to the body's needs.

This can mean:
✅ better tolerance to prolonged effort
✅ support for demanding daily activities
✅ more stable perceived energy, especially during periods of fatigue

• Support for Recovery Through Metabolite Elimination and Nutritional Supply

Efficient muscle recovery involves both elimination of substances resulting from effort (metabolites) and transport of amino acids and micronutrients necessary for recovery. Adequate blood flow contributes to these processes, and support for NO can be relevant when more comfortable recovery is sought.

The formula can support:
✅ muscle recovery through improved perfusion
✅ reduction of muscle "heaviness" after intense effort
✅ energy recharge through more efficient nutritional delivery

• Intelligent Synergy: Citrulline Supports Arginine Levels

A major advantage of the combination is that L-citrulline can be converted to arginine, contributing to maintaining its availability in the body. In practice, citrulline functions as a "background support," which helps the body have a metabolic reserve for the nitric oxide pathway.

The synergy can offer:
✅ more consistent support for NO production
✅ more efficient use of arginine over time
✅ more stable functional effect on circulation

• Support for Muscle Function and Amino Acid Metabolism

L-arginine and L-citrulline are amino acids involved in important metabolic pathways, including in the urea cycle (the mechanism by which the body manages products resulting from protein metabolism). During periods with protein-rich diet or intense training, these pathways can be more stressed, and the presence of amino acids in free form can support metabolic balance.

Possible benefits:
✅ support for nitrogen metabolism in the body
✅ better adaptation to effort and hyperproteic nutrition
✅ metabolic comfort during periods of physical demands

• Practical and Efficient Approach for an Active Lifestyle

Arginine & Citrulline, NOW Foods offers a simple and results-oriented formula: two well-known amino acids, in clear doses, without unnecessary combinations. It is a suitable choice for those seeking support for circulation, performance and energy, in a logical manner compatible with different objectives: fitness, endurance, daily tone or cardiovascular support.

Through this formula, the product positions itself as an ally for:
✅ performance and "pump" in training
✅ circulation and vitality in daily activities
✅ more efficient endurance and recovery

Arginine & Citrulline, NOW Foods is a supplement oriented towards optimizing blood flow and functional energy, using the body's natural mechanisms. By supporting nitric oxide and endothelial function, this combination can help maintain a more "responsive" body: more active, more resilient and better supplied with oxygen and nutrients, both during effort and in daily life.

Directions for Use

Take 1 capsule 2 times daily.

Adjuvant in Various Conditions:

• For cardiovascular health, it can be combined withCoenzyme Q10,Omega-3 Fish Oil andMagnesium.

• For sports performance and recovery, association withAmino Acids,Creatine and Green Tea can be useful

Other Ingredients

Warnings