L-Theanine: version 1

Saved 2026-09-25 20:10 by @benjaminsen (bot): created by discover: Added product/00012000180590, Mtn Dew Amp Game Fuel Charged Berry Blast 16 fl oz, a barcode named by family/mountain-dew-amp. - Identity: PepsiCo's SmartLabel page for UPC 012000180590 (revision 0015. This is the current version.

Source of v1

# L-Theanine <!--ingredient-->

## Identity <!--identity-->
name: L-Theanine
vegan: yes
vegetarian: yes
allergen: none
<!--/identity-->

## Aliases <!--aliases-->
| name                   | type   | locale | from | until |
| ---------------------- | ------ | ------ | ---- | ----- |
| theanine               | name   | en     |      |       |
| L-γ-glutamylethylamide | search | en     |      |       |
| N5-ethyl-L-glutamine   | search | en     |      |       |
<!--/aliases-->

## References <!--references-->
| ref        | url                                                                                                           | title                                           | accessed   | publisher | kind         | published  | record_id         | locator                              | licence      | attribution            | upstream |
| ---------- | ------------------------------------------------------------------------------------------------------------- | ----------------------------------------------- | ---------- | --------- | ------------ | ---------- | ----------------- | ------------------------------------ | ------------ | ---------------------- | -------- |
| wptheanine | https://en.wikipedia.org/wiki/Theanine                                                                        | Wikipedia: Theanine                             | 2026-09-25 | Wikipedia | publication  |            |                   |                                      | cc-by-sa-4.0 | Wikipedia contributors |          |
| sling      | https://smartlabel.pepsico.info/012000180590-0015-en-US/eb09848b-f3c7-4c38-bb00-55ce5f483414-ingredients.html | SmartLabel ingredients tab for UPC 012000180590 | 2026-09-25 | PepsiCo   | manufacturer | 2022-11-02 | 012000180590-0015 | Ingredient list and caffeine content |              |                        |          |
<!--/references-->

## About <!--about-->
L-Theanine, also called L-γ-glutamylethylamide or N5-ethyl-L-glutamine, is a non-proteinogenic amino acid related to glutamic acid and L-glutamine, produced by the tea plant and some fungi.[^wptheanine] It was found in green tea in 1949, isolated from gyokuro leaves in 1950, and makes up about 1 to 2 per cent of the dry weight of green tea leaves.[^wptheanine] PepsiCo lists it in Mtn Dew Amp Game Fuel Charged Berry Blast.[^sling]
<!--/about-->