# L-Theanine supplement

6 Hacker News commenters recommended L-Theanine supplement and 2 criticized it, November 2025 to November 2026. It was recommended in 4 of 13 months.

**Verdict:** People recommend L-theanine as a cheap supplement that helps them feel calm and sleep better, without pharmaceuticals or stimulant pouches.

## Why people recommend it

- Calm and better sleep (3 comments): "I also use L-theanine as an additional supplement for a long duration deep sleep, and think it helps." ([source](https://news.ycombinator.com/item?id=48923991)) "Noticeable calm and reduced "noise" when trying to sleep." ([source](https://news.ycombinator.com/item?id=46841106)) "L-theanine seems to help with calm and focus" ([source](https://news.ycombinator.com/item?id=49012761))

## Alternatives hackers recommend

- [Creatine monohydrate](https://hackerapproved.com/p/creatine.md): 104 recommend
- [Melatonin](https://hackerapproved.com/p/melatonin.md): 43 recommend
- [Magnesium glycinate](https://hackerapproved.com/p/magnesium-glycinate.md): 31 recommend
- [N-acetylcysteine (NAC) supplement](https://hackerapproved.com/p/n-acetylcysteine.md): 17 recommend
- [Psyllium husk](https://hackerapproved.com/p/psyllium-husk.md): 13 recommend

## Cite as

Hacker Approved, "L-Theanine supplement", https://hackerapproved.com/p/l-theanine/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).