L-Glutamine, 500 mg, 100 caps
L-Glutamine provides 500 mg of free-form L-glutamine per vegetarian capsule — the most abundant free amino acid in human muscle tissue and plasma. Unlike most amino acids, which circulate primarily bound within proteins, glutamine is present in enormous quantities as a free molecule, accounting for approximately 60% of the free amino acid pool in muscle tissue. This concentration reflects glutamine's central role in gastrointestinal integrity, immune cell function, nitrogen transport, and neurotransmitter recycling, and its status as a conditionally essential amino acid during periods of illness, surgery, or physiological stress.
Key Benefits:
- Supports Gastrointestinal Barrier Integrity – Glutamine is the primary energy source for the rapidly dividing epithelial cells lining the gut wall. These cells consume glutamine preferentially to maintain the structural integrity of the intestinal barrier, which is essential for preventing the passage of bacteria and toxins from the gut lumen into the bloodstream.
- Promotes Healthy Immune Cell Function – Lymphocytes and macrophages rely on glutamine as a major fuel substrate — much as they use glucose — to support proliferation and activation during periods of immune challenge. Adequate glutamine availability is necessary for the immune system to mount and sustain an effective response.
- Supports Neurotransmitter Recycling and Brain Function – Glutamine plays a central role in the glutamate–glutamine cycle in the brain. Glial cells convert released glutamate into glutamine, which is then shuttled back to neurons to replenish the brain's primary excitatory neurotransmitter supply, supporting healthy cognitive signaling.
- Conditionally Essential During Stress and Intense Physical Demand – Under normal conditions, the body synthesizes sufficient glutamine in muscle and lung tissue. During illness, surgery, or prolonged physiological stress, elevated cortisol accelerates muscle protein breakdown and depletes intramuscular glutamine stores — making supplemental free-form glutamine clinically relevant for maintaining nitrogen balance and recovery support.
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Over 20 Years of Specialized Expertise
Since 2003, New Beginnings Nutritionals has been dedicated to providing specialized, professional-quality supplements for individuals and families navigating complex health challenges. Founded by Dr. William Shaw, Ph.D., a renowned biochemist and toxicologist, our company was born from groundbreaking research and a deep commitment to supporting those with autism, neuropsychiatric disorders, and chronic illness.
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Our products are developed through collaboration with leading physicians, naturopaths, researchers, and healthcare practitioners. Dr. Shaw's pioneering research—including over 32 published articles and books translated into 12 languages—informs every formula we create. This scientific foundation ensures that each supplement is purposefully designed to address real health needs with proven ingredients.
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What truly sets us apart is our commitment to education and customer care. Our knowledgeable team, led by co-founder Lori Knowles-Jimenez and consulting physician Dr. Kurt Woeller, D.O., provides personalized guidance to both practitioners and individuals. We offer educational webinars, evidence-based protocols, and hands-on support to help you navigate your health journey with confidence.
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Our diverse product line addresses multiple aspects of health including:
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Whether you're a healthcare practitioner seeking reliable supplements for your patients or an individual committed to your wellness journey, New Beginnings Nutritionals provides the quality, expertise, and support you need. We're not just selling supplements—we're partnering with you to achieve optimal health through potent, pure, and efficacious nutrition.
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