Fenix Nutrition L-Arginine Complete, Mixed Berry Flavor, 10.5 oz. Powder

List Price: $59.95
Our Price: $58.00

Amino acids are fundamental to a healthy human body, and l-arginine is no exception. In fact, given its primary role in nitric oxide production, l-arginine might be the most valuable amino acid for certain individuals to supplement for. Fenix Nutrition L-Arginine Complete is designed to bring these individuals the most bioavailable formulation available on the market.

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  • 5000 mg of l-arginine per serving.
  • Also features the amino acid l-citrulline.
  • Micronutrient blend includes vitamin D, vitamin K, B complex vitamins, magnesium, and chromium.
  • May provide nutritional support for healthy blood flow and the cardiovascular system.
  • 30 complete servings of mixed berry flavored powder per container.

Reasons for L-Arginine Supplementation

Of all the amino acids which play a pivotal role in the health and function of the human body, why would one want to supplement for l-arginine in particular? The easiest answer is many reasons, but let’s take some time to unpack what those particular reasons might be, and who might benefit most from quality l-arginine supplements like Fenix Nutrition L-Arginine Complete.

Nitric Oxide – You can’t discuss l-arginine without also exploring the topic of nitric oxide (NO). NO is a gas which is synthesized from l-arginine and nitric oxide synthase. After formation, NO is known to play a pivotal role in a wide variety of bodily systems. These include the respiratory system, the cardiovascular system, and the immune system.1 In spite of its diverse supportive functions, NO is best known for its effect on muscle contractions which contribute to healthy blood flow.2 This may provide support for sexual and cognitive functions.

Muscle Formation – Amino acids are the building blocks of protein, and protein is fundamental to the formation of muscle mass. However, different amino acids might have different effects on this process. One study conducted on animal models indicates that l-arginine in combination with resistance training might be particularly helpful for muscle mass formation and overall strength.3

Exercise Metabolism – In addition to aiding in muscle formation, l-arginine may be able to contribute to other aspects of your exercise routine. After reviewing the literature on the effects of l-arginine consumption on resting and exercise metabolism, one study concluded that l-arginine alters skeletal-muscle metabolism, insulin sensitivity, and capillary growth in muscles during and resulting from exercise.4


Storage: Store in a cool, dry place. Slight color changes may occur over time from the natural fruit flavor. This is normal and does not change efficacy or potency.


  • If pregnant, nursing, or undergoing treatment for a medical condition, consult your physician before taking this product.
  • Keep out of reach of children.
  • Do not exceed recommended dose.


* These statements have not been evaluated by the Food and Drug Administration. This Product is not intended to diagnose, treat, cure or prevent any disease.

Supplement Facts

Serving Size: 1 Scoop

Servings Per Container: 30

Amount Per Serving
Calories 10
Total Fat 0 g
Total Carbohydrate 3 g
Sugars 0 g
Protein 0 g
L-Arginine 5000 mg
L-Citrulline 1000 mg
Vitamin C (Ascorbic Acid) 60 mg
Vitamin D (Cholecalciferol) 2500 IU
Vitamin K2 (Menaquionone MK-7) 20 mcg
Vitamin B6 (Pyridoxine Hydrochloride) 2 mg
Folate (Folic Acid) 400 mcg
Vitamin B12 (Methylocabalamin) 15 mcg
Magnesium (Citrate) 20 mg
Chromium (Picolinate) 200 mcg
Other Ingredients: Citric Acid, Natural Flavors, Malic Acid, Beet Root Powder (for color), Silicon Dioxide, Stevia

Dosage & Use

  • Mix 1 serving (one scoop) in 8-12 ounces of water (to taste).
  • Sir, blend, or shake to dissolve.
  • For very cold water, dissolve for one minute to dissolve.
  • Take 1 serving (one scoop) up to twice per day.


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  1. Nitric Oxide | Science Direct
  2. Nitric Oxide: An Important Signaling Mechanism Between Vascular Endothelium and Parenchymal Cells in the Regulation of Oxygen Consumption
  3. Resistance training and L-arginine supplementation are determinant in genomic stability, cardiac contractility and muscle mass development in rats
  4. Effects of L-arginine supplementation on exercise metabolism.