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L-arginine

What is L-arginine? Why do we need it?




L-arginine is an amino acid that helps the body build protein. Under certain circumstances, such as illness or stress, the body may require additional amounts [i]. L-arginine is also used supplementally because it may help your body produce proteins after exercise[ii]. Additionally, recent research suggests that L-arginine may lower blood pressure, improve cholesterol and improve overall blood vessel health[iii][iv].




Where does dietary L-arginine come from?




L-arginine is also found in most protein-rich foods, including fish, red meat, poultry, soy, grains, beans and dairy products[v].




What does deficiency of L-arginine look like?




L-arginine deficiency is pretty rare as the body can usually produce adequate amounts of it on its own, and it is found in plenty of foods. However, in certain circumstances, such as severe illness or medical conditions, the body's ability to produce or use L-arginine may be compromised[vi].


People who are deficient in L-arginine may exhibit symptoms such as:


Impaired wound healing, Poor immune function, Cardiovascular issues, Sexual dysfunction




What does L-arginine do? What are the benefits of taking L-arginine supplementally?




Nitric oxide production


L-arginine is a precursor to nitric oxide (NO), a molecule that helps dilate and relax blood vessels, thereby improving blood flow[vii]. Nitric oxide is important for cardiovascular health and plays a role in regulating blood pressure[viii].


Athletic performance


L-arginine is used by athletes and bodybuilders due to its potential to enhance performance[ix]. As such, it is believed to increase blood flow to muscles and promote muscle growth and maintenance of strength[x][xi][xii].


Blood pressure


L-arginine is a precursor to nitric oxide (NO), a molecule that helps dilate and relax blood vessels, leading to improved blood flow. By promoting the production of nitric oxide, L-arginine may have a blood pressure-lowering effect[xiii].


Blood sugar regulation


Research shows that L-arginine may benefit those with diabetes by improving glucose metabolism[xiv]. Nitric oxide also plays important roles in cellular function and how your body responds to insulin[xv]


Cholesterol and healthy blood vessels


Some studies suggest that L-arginine supplementation may have a positive impact on certain markers of cholesterol metabolism[xvi]. Although L-arginine does not directly affect cholesterol levels in the body, nitric oxide, synthesised from L-arginine, plays a role in maintaining the health and function of blood vessels[xvii].




Precautions:




Allergies


It is very rare, but some people might be allergic or sensitive to L-arginine. Symptoms may include rash, itching, swelling, dizziness, or difficulty breathing. If you experience any signs of an allergic reaction, discontinue use and seek immediate medical attention[xviii].


Guanidinoacetate methyltransferase deficiency


Those with an inherited disorder that affects arginine metabolism, should avoid L-arginine due to the potential for adverse effects[xix].


Herpes virus outbreaks


L-arginine may promote the replication of the herpes simplex virus (HSV), potentially leading to outbreaks[xx].


Surgery and bleeding disorders


L-arginine can affect blood clotting. It may increase the risk of bleeding during and after surgery[xxi].




Dosage




Please follow the advice of a nutritional therapist or the recommendations as per the product packaging when taking L-arginine supplements.


Specific medical conditions


In some cases, higher doses of L-arginine may be recommended for specific medical conditions, such as certain cardiovascular diseases or wound healing. In such cases, supervision by a healthcare professional is required.




Side Effects




Gut issues


In rare cases, L-arginine may cause digestive discomfort such as bloating, diarrhoea, or abdominal pain. These side effects are usually mild and go away quickly[xxii].


Low blood pressure


L-arginine has the potential to lower blood pressure. While this can be beneficial for those with high blood pressure, it may cause symptoms such as dizziness, light-headedness, or fainting in some. If you’re aware that you have low blood pressure or are taking medications that lower blood pressure, it is important to monitor your blood pressure closely while using L-arginine[xxiii].




Interactions




Blood pressure medications


L-arginine has the potential to lower blood pressure. If you are taking medications for high blood pressure or other cardiovascular conditions, it is important to discuss the use of L-arginine with your healthcare provider, as it may interact with these medications[xxiv].


Other drug interactions


L-arginine may interact with certain medications such as nitrates and erectile dysfunction medications like sildenafil (known as Viagra)[xxv]. It is advisable to consult with a healthcare provider or pharmacist to check for any potential interactions before taking L-arginine with other medications.


Pregnancy and breastfeeding


Although dietary L-arginine in food is required for development of the baby, limited research is available on the safety of L-arginine supplementation. It is recommended to consult with a healthcare professional before using L-arginine if you are currently pregnant or breastfeeding[xxvi].

Recommended For

Low Libido (Female) , Wound healing (Post Surgery Healing) , Low Libido (Male) , Cholesterol , Blood Sugar Balance , High Blood Pressure (Hypertension) , Sports Performance , Sports Injury

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