
The amino acids glutamine, ornithine, and arginine are believed to promote better sleep by switching off ammonia, a cellular toxin that can impair brain function and cause sleeplessness. Glutamine, for instance, is the most important supplier of energy to the immune and intestinal cells, and it helps against stress, depression, and anxiety. Ornithine, meanwhile, is believed to increase levels of another amino acid called arginine, which may help promote blood flow, athletic performance, and wound healing. Research has shown that taking L-arginine supplements before bed can increase growth hormone levels. However, it is important to consult a healthcare professional before taking any supplements, as they could interact with certain medications and cause side effects such as gastrointestinal issues.
| Characteristics | Values |
|---|---|
| What | Glutamine, Arginine, and Ornithine are amino acids |
| Why | To promote better sleep |
| How | By 'switching off' ammonia, a cellular toxin that can cause sleeplessness |
| Arginine Sources | Meat, poultry, dairy, nuts, fish, and soy products |
| Arginine Dosage | 6-30 grams per day, divided into three smaller doses |
| Glutamine Dosage | 15-30 grams per day for up to 12 months |
| Ornithine Sources | Ornithine is made in the body and can also be made in a lab |
| Ornithine Benefits | Ornithine ingestion improved sleep disturbances in a study on Japanese Antarctica expedition members |
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What You'll Learn
- Glutamine, arginine, and ornithine promote better sleep by reducing ammonia levels
- The average dosage of L-arginine is 6-30 grams per day
- Glutamine is an amino acid that stabilises the immune system
- L-arginine is an amino acid that may promote blood flow
- Arginine and ornithine increase growth hormone levels

Glutamine, arginine, and ornithine promote better sleep by reducing ammonia levels
Amino acids are molecules within the body that produce proteins when they combine with other molecules. Amino acids are essential for human functioning as every cell in the human body contains protein.
Glutamine, arginine, and ornithine are amino acids that promote better sleep by reducing ammonia levels. Ammonia is a cellular toxin created when proteins are broken down. It stops energy production in the cells and severely restricts cellular respiration. High ammonia levels can lead to sleeplessness. Glutamine, arginine, and ornithine stimulate liver detoxification, converting ammonia into urea. Arginine is derived from ornithine, so ornithine strengthens the effect of arginine. The result is improved sleep, support for liver functions, accelerated healing of wounds, and detoxification.
Glutamine is involved in many metabolic processes and is the most important supplier of energy to the immune and intestinal cells. It stabilises the immune system, strengthens intestinal cells, and helps against stress, depression, and anxiety. It also functions supportively in the treatment of depression. Glutamine acts as a natural sedative in the brain, improving concentration and restorative sleep.
Arginine is an amino acid that helps the body produce proteins. It may help promote blood flow, athletic performance, and wound healing. It is necessary for the production of nitric oxide, a signalling molecule that is needed for various bodily processes and functions, including blood flow regulation, mitochondrial function, and cellular communication. Arginine also acts as a precursor to other amino acids, including glutamate, proline, and creatine.
Research has shown that taking L-arginine and L-lysine supplements before bed increases growth hormone levels. L-arginine supplements have a strong safety profile, but it is still best to consult a healthcare professional before taking them. The average dosage of L-arginine is between 6 grams to a maximum of 30 grams per day.
Ornithine is an amino acid made in the body but not used to create protein. It plays a role in other processes, such as increasing muscle size. Ornithine ingestion has been shown to improve sleep disturbances. However, there is no good scientific evidence to support most of its uses.
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The average dosage of L-arginine is 6-30 grams per day
L-arginine is an amino acid that helps your body produce proteins, which are essential as every cell in your body contains proteins. It can be synthesized from the amino acid citrulline through the breakdown of body proteins or obtained through dietary protein intake from foods like meat, poultry, dairy, nuts, fish, and soy products. L-arginine is also necessary for the production of nitric oxide, a signalling molecule that is needed for blood flow regulation, mitochondrial function, and cellular communication.
The average dosage of L-arginine is between 6 grams and a maximum of 30 grams per day. The daily dose is normally divided into three smaller doses per day that do not exceed the maximum dosage. It is important to speak with a healthcare professional before taking L-arginine supplements, as they could help you decide whether they are safe to take or suggest an alternative supplement.
Research has shown that L-arginine may offer various potential benefits when used as a supplement, including increasing nitric oxide in the body, which improves blood flow and oxygenation to organs, muscles, and tissues. L-arginine may also help reduce inflammation and oxidative stress, as well as improve glucose metabolism and insulin sensitivity. Short-term use of L-arginine is generally safe and well-tolerated when taken as a supplement, but it may cause gastrointestinal side effects.
L-arginine, along with L-glutamine and ornithine, can also promote better sleep. Ornithine is an amino acid that is made in the body but is not used to create protein. It might help increase levels of another amino acid called arginine and might also increase levels of hormones that increase muscle size. Ornithine supplementation has been shown to improve sleep disturbances, increase sleep-like behaviour in mouse pups, and improve sleep quality in healthy workers.
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Glutamine is an amino acid that stabilises the immune system
Glutamine is an amino acid that is naturally produced in the body and found in many foods. It is the most abundant amino acid in the body and is a building block of protein. It plays a key role in the digestive and immune systems, helping to repair damaged tissue and maintain a healthy gut.
Glutamine is a crucial power source that fuels the immune system. It provides fuel for immune cells, including white blood cells, which use glutamine to protect the body from infections and keep it healthy. It also helps maintain the connections in the intestines strong, supporting intestinal health.
The body's ability to produce glutamine may be compromised during injury, severe illness, or other catabolic/hypercatabolic situations. In these cases, glutamine supplementation may be beneficial for immune health and recovery. Studies have shown that glutamine supplements may improve health outcomes, reduce infections, and lead to shorter hospital stays after surgery. However, more research is needed to fully understand the potential side effects of long-term glutamine supplementation, including how it may change the way the body uses amino acids to produce energy.
Glutamine is also found in many foods, with the largest amounts in high-protein animal products such as meat, poultry, and dairy. It is also present in some plant-based foods, with certain plant-based proteins having a greater percentage of glutamine in their protein content. A typical diet is estimated to contain 3 to 6 grams of glutamine per day, but this can vary depending on dietary choices.
In summary, glutamine is an essential amino acid that plays a critical role in stabilising the immune system. It helps protect the body from infections, supports tissue repair, and maintains intestinal health. While supplementation may be beneficial in certain cases, it is important to consult with a healthcare provider to ensure the safe and effective use of glutamine supplements.
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L-arginine is an amino acid that may promote blood flow
L-arginine is a semi-essential or conditionally essential amino acid, meaning that while the body can produce it, it must also be included in one's diet. Amino acids are molecules that produce proteins when they combine with other molecules. L-arginine is necessary for making proteins, as it acts as a precursor to other amino acids, including glutamate, proline, and creatine. It can be synthesized from the amino acid citrulline or obtained through dietary protein intake from foods like meat, poultry, dairy, nuts, fish, and soy products.
L-arginine is also necessary for the production of nitric oxide, a signalling molecule that is needed for various bodily processes and functions, including blood flow regulation, mitochondrial function, and cellular communication. Nitric oxide causes blood vessels to open wider, improving blood flow and oxygenation to organs, muscles, and tissues. It is also necessary for the relaxation of the cells that make up blood vessels.
Research has shown that L-arginine may offer various potential benefits when used as a supplement, including improved blood flow. Short-term use of L-arginine supplements is generally safe and well-tolerated, but it may cause gastrointestinal side effects. The average dosage of L-arginine is between 6 grams to a maximum of 30 grams per day, normally divided into three smaller doses that do not exceed the maximum dosage. However, it is important to speak with a healthcare professional before taking L-arginine supplements, as they may interact with certain medications, such as blood-pressure-lowering medications, erectile dysfunction medications, blood-thinning medications, and diabetes medications.
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Arginine and ornithine increase growth hormone levels
Arginine is an amino acid that helps your body produce proteins. Proteins are essential because every cell in your body contains proteins. Your body can make arginine in addition to getting it from food sources, so deficiencies are rare. Arginine is necessary for the production of nitric oxide, a signalling molecule that is needed for a variety of bodily processes and functions, including blood flow regulation, mitochondrial function, and cellular communication.
Ornithine is also an amino acid that is made in the body. It is not used to create protein but plays a role in other processes. Ornithine might help increase levels of another amino acid called arginine. It might also increase levels of hormones that increase muscle size.
Research has shown that arginine and ornithine supplementation increases growth hormone and insulin-like growth factor-1 serum levels after heavy-resistance exercise in strength-trained athletes. A study found that oral administration of L-ornithine increased growth hormone secretion in mice. Another study found that L-arginine supplementation alone had a significant effect on growth hormone release.
The average dosage of L-arginine is between 6 grams to a maximum of 30 grams per day, normally divided into three smaller doses per day that do not exceed the maximum dosage. The dosage of L-arginine varies depending on what it is being used to treat. For example, the dosage for high blood pressure is 15 to 30 grams per day for up to 90 days. It is important to speak with a healthcare professional before taking L-arginine supplements.
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Frequently asked questions
The recommended dosage of L-arginine is between 6 grams to a maximum of 30 grams per day. The daily dose is normally divided into three smaller doses per day that do not exceed the maximum dosage. There is no information on the dosage of glutamine and ornithine to improve sleep, but glutamine is the most important supplier of energy to the immune and intestinal cells.
Glutamine, arginine, and ornithine promote better sleep by 'switching off' the most important disturbing factor: ammonia. This cellular toxin is created by the breakdown of proteins. Arginine is an amino acid that helps your body produce proteins. It may also help promote blood flow, athletic performance, and wound healing. Glutamine also helps against stress, depression, and anxiety.
Short-term use of L-arginine is generally safe and well-tolerated when taken in supplement form. However, it may cause gastrointestinal side effects. Glutamine can also cause side effects such as nausea or vomiting, and allergic reactions.











































