When It Might Be Worth Discussing with Your Doctor Consider talking to your healthcare provider about L-theanine if: Your child has ADHD with significant sleep difficulties (the one area with reasonable evidence) You're already on ADHD medication and looking for complementary support for sleep You're interested in the L-theanine + caffeine combination under medical supervision You've tried multiple evidence-based approaches and are exploring all safe options If Your Child Struggles with Stimulants If your child has struggled with stimulant medications, explore these evidence-based alternatives first: Non-stimulant ADHD medications (atomoxetine, guanfacine, viloxazine) Different stimulant formulations or dosing schedules Behavioural therapy and coaching Educational accommodations L-theanine might be worth trying for sleep issues specifically, but it's not a substitute for proven ADHD treatments

Cognitive support: as noted in the JAMA data, executive function and verbal memory improvements have been documented, making it relevant for patients with early cognitive concerns
Biochem Med Metab Biol 37: 258264
MEDIPEEL Medi-Peel Glutathione Hyal Aqua Trial Kit
It is not for human or animal use , diagnostic procedures, or therapeutic applications
By contrast, none of the mainstream guidelines, including those from the International Association for the Study of Pain (IASP