Merchient’s ingredient library
The library supports 1 wording for L-theanine; the strongest is “Supports a temporary feeling of relaxation” (moderate, 200-250 mg a day). Avoid wording that names or implies a disease, a drug or a treatment, such as “Treats or relieves anxiety”.
Also called: Theanine, N-ethyl-L-glutamine
Reviewed
Not legal advice. This guide shows the wording that published evidence supports at a daily dose, from the sources linked below; it is not a ruling on any claim. Your own product, its form and dose, and your own evidence still need to match the wording you use.
Supported wordings
Moderate evidenceWording 1
Claims Facts
“Supports a temporary feeling of relaxation.”
| Daily dose | 200-250 mg a day |
|---|---|
| Support | Health Canada lists this use at 200-250 mg a day, citing a few small human studies; no other listed source covers L-theanine. |
| Dose details | Adults 18 and older, total per day. Health Canada sets no timing or duration statement. |
| Form | L-theanine from tea leaf or synthetic, taken by mouth |
| Source | Health Canada monograph: L-Theanine |
Wordings to avoid
Claims Facts
| Wording to avoid | Reason |
|---|---|
| “Treats or relieves anxiety”Anxiety disorders are diagnosable conditions; the evidence covers a temporary feeling of relaxation, not an effect on a disorder. | Disease |
| “A natural alternative to anti-anxiety medication, or naming a drug such as alprazolam (Xanax)”Compares the product to a drug and implies it does a drug’s job. | Drug |
| “Cures stress”Promises a cure; the supported effect is short-term relaxation. | Treatment |
Disease: names or implies a disease. Drug: names a drug or presents the product as one. Treatment: promises to treat, cure or prevent a condition.
Vera, Merchient’s AI employee, reads your site and emails you the riskiest line, why, a safer rewrite and how many more like it she found. Reply, and you get the free first report.
Or write to hello@merchient.com