Solaray L-Arginine 500mg 100 Capsules

L-Arginine Free Form 500 mg is an oral dietary supplement providing L-Arginine (500 mg) in its crystalline, unbound free-form state for rapid biological assimilation. As a semi-essential conditionally required amino acid, L-Arginine serves as the direct obligate substrate for the endothelial nitric oxide synthase (eNOS) enzyme pathway. Within vascular endothelial cells, eNOS catalyzes the oxidation of L-arginine into nitric oxide (NO) and L-citrulline. The produced nitric oxide diffuses into adjacent vascular smooth muscle, activating soluble guanylyl cyclase (sGC) to elevate cyclic guanosine monophosphate (cGMP) levels, which triggers smooth muscle relaxation, peripheral vasodilation, improved arterial compliance, and enhanced microvascular perfusion. It additionally plays an indispensable physiological role in hepatic ammonia detoxification via the urea cycle, creatine biosynthesis, and the stimulation of pituitary growth hormone (GH) secretion, packaged in a bottle of 100 vegetarian capsules.

Key Benefits

• Endothelial Vasodilation & Nitric Oxide (NO) Boost: Direct precursor to endogenous nitric oxide, promoting vascular relaxation, arterial suppleness, and optimal systemic blood flow.

• Muscular Pump & Exercise Performance: Supports nutrient and oxygen delivery to active skeletal muscle during resistance training, aiding muscle pump, intra-workout stamina, and accelerated metabolic recovery.

• Cardiovascular & Blood Pressure Support: Contributes to the regulation of healthy vascular tone and maintenance of normal blood pressure ranges.

• Male Reproductive & Erectile Health: Enhances cavernous microcirculation by upregulating the NO-cGMP signaling cascade essential for physiological erectile response.

• Ammonia Detoxification & Urea Cycle: Functions as an integral intermediate in the Krebs-Henseleit urea cycle, clearing neurotoxic ammonia generated by intense exercise and high-protein turnover.

• Rapid Free-Form Uptake: Delivered as a free-form amino acid that bypasses the proteolytic peptide-breakdown steps required for intact protein digestion, allowing fast gastrointestinal uptake.

Key Ingredients (per capsule)

• L-Arginine (as L-Arginine HCl or Free-Form Base - 500 mg): Pure crystalline pharmaceutical-grade amino acid.

• Capsule Shell & Excipients: Vegetable cellulose capsule, microcrystalline cellulose, magnesium stearate, and silica.

Key Features

• Product Type: Free-Form Amino Acid Oral Dietary Supplement

• Indications: Circulatory support, endothelial function maintenance, athletic performance/pre-workout vascularity, urea cycle support, and male vitality

• Unbound free-form amino acid ensuring rapid absorption

• 100% vegetarian capsule formulation

• Pack size: 100 vegetarian capsules

How to Use

• Take 1 capsule daily with a meal or a glass of water.

• For athletic performance and muscle pump support, take 1 to 2 capsules 30 to 45 minutes prior to exercise, preferably on an empty stomach.

• Drink plenty of water throughout the day while supplementing with amino acids.

• If taking prescription antihypertensive drugs, erectile dysfunction phosphodiesterase-5 (PDE5) inhibitors, or nitrates for cardiac conditions, consult a physician prior to use due to additive vasodilatory effects. Avoid use during active outbreaks of herpes simplex virus (HSV).