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Arginine , also known as L-arginine , is an amino acid that plays a vital role in various physiological processes in the body . It is classified as a semi-essential or conditionally essential amino acid, which means that under certain circumstances the body may require a higher amount than it can produce on its own. Arginine is involved in protein synthesis , hormone production, immune function and dilation of blood vessels. One of the primary functions of arginine is its role in the production of nitric oxide ( NO ). Nitric oxide is a powerful vasodilator that helps relax and dilate blood vessels and improves blood flow throughout the body.
This vasodilating effect may have several potential benefits, such as promoting cardiovascular health, regulating blood pressure, and increasing exercise performance . Arginine is also involved in the synthesis of creatine , a compound that plays a key role in energy production , especially during high-intensity activities. By increasing creatine levels, arginine can help improve muscle strength and performance , making it a popular supplement among athletes and fitness enthusiasts. In addition, arginine has been investigated for its potential immune-enhancing effects. It plays a role in the activation and proliferation of immune cells, supports the body's defense against pathogens and supports overall immune function.
Arginine occurs naturally in a variety of protein-rich foods such as meat , poultry , fish , dairy products , and legumes .
While arginine is generally well tolerated, it may interact with certain medications or have potential side effects in some individuals. People with certain medical conditions, such as herpes infections or cardiovascular disease, should exercise caution and consult a professional before starting arginine supplementation.