L-Theanine supplement
Ranked 8 of 10 dietary supplements by recommenders
People recommend L-theanine as a cheap supplement that helps them feel calm and sleep better, without pharmaceuticals or stimulant pouches.
People recommend L-theanine as a cheap supplement that helps them feel calm and sleep better, without pharmaceuticals or stimulant pouches.
8 people gave an opinion
- recommend it
- 6
- criticize it
- 2
- approval share
- 75%
Recommended in 4 of 13 months
- November 2025: not recommended
- December 2025: recommended
- January 2026: recommended
- February 2026: not recommended
- March 2026: recommended
- April 2026: not recommended
- May 2026: not recommended
- June 2026: not recommended
- July 2026: recommended
- August 2026: not recommended
- September 2026: not recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 6 people recommend itNeeds 10 or more, not met.
- 3 recommenders for every criticNeeds 2 to 1 or better, met.
- Recommended in 4 of 13 monthsNeeds 4 or more, met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Calm and better sleep
“I also use L-theanine as an additional supplement for a long duration deep sleep, and think it helps.”
Comment from 15 Jul 2026 in “Sleep regularity is a stronger predictor of mortality risk than sleep duration” “Noticeable calm and reduced "noise" when trying to sleep.”
Comment from 31 Jan 2026 in “Ask HN: What actually helped you reduce stress & sleep when advice didn’t work?” “L-theanine seems to help with calm and focus”
Comment from 22 Jul 2026 in “Does creatine make you smarter?”
Other dietary supplements people recommend
The four most recommended other dietary supplements, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| Creatine monohydrate | 104 | 51 | 67% | 8 | 1 yr21 owners | Approved |
| Melatonin | 43 | 24 | 64% | 8 | — | — |
| Magnesium glycinate | 31 | 7 | 82% | 8 | — | Approved |
| N-acetylcysteine (NAC) supplement | 17 | 5 | 77% | 5 | — | Approved |
| L-Theanine supplementThis page | 6 | 2 | 75% | 4 | — | — |
What people said
8 of the 9 comments that mention it, newest first. Each links to the original comment.
“L-theanine seems to help with calm and focus”
“I also use L-theanine as an additional supplement for a long duration deep sleep, and think it helps.”
“I personally have adverse reactions to L-Theanine.”
“didn't do anything that I could tell”
“L-theanine seems to help keep them at bay”
“Noticeable calm and reduced "noise" when trying to sleep.”
“That delivers some of the best bang for buck boost without sucking on pouches or abusing pharmaceuticals”
“I take 100mg L-theanin daily so my body tolerates it.”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.