They're contraindicated in anyone with a personal or family history of medullary thyroid carcinoma or Multiple Endocrine Neoplasia syndrome type 2 [3][4]
It is a big deal
In terms of attention, a study involving 27 healthy adults showed that a high dose of L-theanine could improve the neurophysiological indexes of attention processing in a dose-dependent manner (60)
General Comments Comment: Many commenters, including, for example, hospitals and hospital associations, information technology developers, researchers, employers, payers, healthcare consumers, and consumer advocates expressed support for the Administration's goals of making more meaningful price information available to patients to support a more competitive, innovative, affordable, and higher quality healthcare system
You cannot access it without a prescription, as it isn't safe for everyone
All codes verified against the CDC/NCHS ICD-10-CM FY2026 Tabular List