## Evidence on L-glutamine Consumption and Cancer Risk
Does L-glutamine cause cancer?
- There is currently no strong evidence that consuming L-glutamine, either through diet or supplements, causes cancer[1][2][3].
- Cancer is caused by genetic changes in cells, not by glutamine intake itself[1].
Glutamine and Cancer Cells
- Many cancer cells use glutamine as a fuel to grow and multiply, and tumors are often "avid glutamine consumers"[2][4][5][6].
- However, this does not mean that consuming glutamine causes cancer; rather, cancer cells exploit glutamine already present in the body[1][2][4].
Supplementation and Cancer Patients
- Some studies suggest that glutamine supplementation is well tolerated in cancer patients, but others have reported side effects such as gastrointestinal symptoms and rare cases of liver toxicity[5].
- There is no evidence that glutamine supplements make tumors grow faster, and some research even suggests supplementation may decrease tumor growth in certain contexts[3][7].
Summary
- Glutamine is essential for normal body function and is the most abundant amino acid in the blood[2][4].
- Cancer cells rely on glutamine, but cancer is not caused by glutamine consumption; it arises from genetic mutations[1][2].
- No current evidence shows that taking L-glutamine supplements increases cancer risk in healthy individuals[1][3][5].
If you have cancer or are at high risk, consult your doctor before taking glutamine supplements[1][5].
Sources
[1] Glutamine and Cancer: How It Works, What to Do - Healthline https://www.healthline.com/health/glutamine-and-cancer
[2] Glutamine and cancer - PMC https://pmc.ncbi.nlm.nih.gov/articles/PMC1243066/
[3] Glutamine, cancer, and its therapy - ScienceDirect.com https://www.sciencedirect.com/science/article/pii/S0002961096002176
[4] Glutamine: What It Is, Benefits & Side Effects - Cleveland Clinic https://my.clevelandclinic.org/health/articles/glutamine
[5] Glutamine - Memorial Sloan Kettering Cancer Center https://www.mskcc.org/cancer-care/integrative-medicine/herbs/glutamine
[6] Targeting glutamine metabolism as a therapeutic strategy for cancer https://www.nature.com/articles/s12276-023-00971-9
[7] Glutamine Supplementation as an Anticancer Strategy: A Potential ... https://pmc.ncbi.nlm.nih.gov/articles/PMC10930819/
[8] Study shows how glutamine can help or hinder cancer-killing activity https://www.news-medical.net/news/20230705/Study-shows-how-glutamine-can-help-or-hinder-cancer-killing-activity.aspx