Pure Rebuild Raspberry Lemonade By 1 Up Nutrition 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.

Creatine is an organic amine that occurs naturally in the body and is also found in certain foods, such as meat and fish. It is stored mostly in the skeletal muscles, where it is used to generate energy during physical activity. Creatine is a popular over-the-counter dietary supplement, and some evidence suggests it is effective at improving exercise performance, particularly during high-intensity activities such as weightlifting and sprinting. However, the degree to which creatine supplements may improve exercise performance can vary depending on the individual and the type of physical activity being performed Creatine is generally well-tolerated but may cause some minor side effects, such as cramping and water retention in some individuals. Long-term use has been rarely linked to kidney problems, but its use is generally regarded as safe. There are several different forms of creatine available, with the most common form being monohydrate salt. Other salt forms, including di-creatine citrate and 'pH buffered' creatine, are also available.