Advanced Collagen Formula By GNC Women's Overview & Drug Interactions

L-glutamine is the most abundant free amino acid in the body, produced primarily in skeletal muscle and then released into circulation. It serves vital roles in various tissues, including the immune system, gastrointestinal tract, kidneys, and liver, where it supports essential functions such as maintaining intestinal integrity, immune response, and amino acid balance. Although traditionally classified as a non-essential amino acid, during periods of severe stress, glutamine becomes conditionally essential due to the body's increased demand. It acts as a critical nitrogen and carbon transporter between organs, and while the intestinal mucosa can synthesize glutamine, this production is insufficient during times of significant physiological stress. Dietary supplements generally contain L-glutamine as it is the biologically active form of the amino acid.

L-Threonine is an essential amino acid, meaning it must be obtained through the diet since the body cannot produce it on its own. It plays a crucial role in supporting overall health and well-being. L-Threonine is involved in protein synthesis, aiding in the formation of collagen, elastin, and muscle tissue. It also contributes to maintaining proper immune function and balancing nitrogen levels within the body.

Glycine is an amino acid found naturally in the body and is also available as a dietary supplement. It is considered a non-essential amino acid, meaning that the body can produce it on its own. Glycine supplementation has been studied for its potential to help improve sleep quality as it is purported to help to promote relaxation and reduce muscle tension. Some studies have also suggested that it may help to improve symptoms of sleep disorders such as insomnia. Glycine has also been studied for its potential to help with the management of some types of chronic pain, such as osteoarthritis, and for improving cognitive function.

Aspartic acid, also known as aspartate, is a non-essential amino acid that plays a crucial role in various physiological processes within the body. It functions as a building block in protein synthesis and is a central component of various enzymes. Additionally, aspartic acid plays a key role in the metabolism of nitrogen. Aspartic acid has been studied for its potential benefits as a dietary supplement. Research indicates that it may aid in cognitive function and memory by increasing the levels of the neurotransmitter acetylcholine, which is critical for memory and learning. Furthermore, aspartic acid has been suggested to enhance athletic performance by increasing energy and endurance through the elevation of creatine levels. It is worth mentioning that aspartame, an artificial sweetener, contains around 40% aspartic acid. Aspartic acid exists in two forms, D-aspartic acid (D-AA) and L-aspartic acid (L-AA). The structural difference between the two forms is the arrangement of atoms in their molecular structure. D-aspartic acid is more commonly found in dietary supplements for athletics, as it has been studied for its effects on testosterone levels and muscle growth.

L-tyrosine is a non-essential amino acid produced within the body through the conversion of the essential amino acid, phenylalanine. It is often used as a dietary supplement to support cognitive function, enhance focus, and mitigate stress by serving as a precursor for neurotransmitters like dopamine and norepinephrine.

Methionine is an essential amino acid, meaning it must be obtained through the diet since the body cannot produce it on its own. It plays a crucial role in protein synthesis and various metabolic processes. Methionine is commonly found in protein-rich foods like meat, fish, dairy products, and certain plant-based sources, making it an important component of a balanced diet to support overall health and proper bodily functions.