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Which theanine should you buy · data from
The best theanine of 2026
A green tea amino acid that lowers stress somewhat and improves sleep. With caffeine it improves attention and takes the edge off.
from €0.124/capsulemedian €0.552up to €0.942/capsule
† Some links are affiliate links — they do not change the ranking
Some store links are affiliate links: if you buy through them, this site may earn a commission at no extra cost to you. It changes nothing in the ranking: the score is computed beforehand and without reading those links, and products with no affiliate programme appear exactly the same. How it is calculated.
Nothing is claimed about the formula in this category. None of these stores publishes how much active ingredient each dose carries, so the score comes from the price per capsule and the verification level, and nobody appears here as well or badly dosed: we do not have the data and we do not make it up.
Now Foods L-teanina 100mg - 90 tabletas masticables
€0.124/capsuleNo third-party seal
€0.124 per capsule: the cheapest of those that meet the category's requirements and are not underdosed.
Score 79 out of 100: the highest mark, with 35 % of the weight on price per capsule.
At HSN · see how its score breaks down
Full comparison
18
products compared
from €0.122 to €0.942
per capsule
0
at verified level 4
Filter and sort
| # | Product | Store | |||
|---|---|---|---|---|---|
| 01 | HSN+€3.99 delivery | €11.17 | €0.124 /capsule | 79 | |
| 02 | Hivital L-Teanina 180 Cápsulas Veganas · 1/2 requirements | DosFarma+€3.99 delivery | €22.00 | €0.122 /capsule | 76 |
| 03 | Sotya Ashwagandha Ksm66+Bisglicinato+L Teanina 720 mg 90 Caps · 2/2 requirements | Bulevipfree delivery from €40 | €13.13 | €0.146 /capsule | 76 |
| 04 | Fepadiet Fepa L-Teanina 60caps · 1/2 requirements | PromoFarma | €14.99 | €0.250 /capsule | 59 |
| 05 | Plantis Teanin 60 Cápsulas · 0/2 requirements | PromoFarma | €13.93 | €0.232 /capsule | 55 |
| 06 | PromoFarma | €21.63 | €0.360 /capsule | 54 | |
| 07 | Lamberts L-Teanina 200mg 60 Cápsulas · 2/2 requirements | DosFarma+€3.99 delivery | €35.32 | €0.589 /capsule | 54 |
| 08 | Sura Vitasan L-Teanina 250mg 30 Cápsulas · 2/2 requirements | DosFarma+€3.99 delivery | €17.99 | €0.600 /capsule | 53 |
| 09 | Solaray L Theanine 200 mg 45 Cápsulas Vegetales · 2/2 requirements | DosFarma+€3.99 delivery | €32.99 | €0.733 /capsule | 52 |
| 10 | Aldous Labs Nootrópico con Ginkgo Biloba · 80 uds · 1/2 requirements | Bulevipfree delivery from €40 | €34.99 | €0.437 /capsule | 51 |
| 11 | PromoFarma | €15.39 | €0.513 /capsule | 50 | |
| 12 | PromoFarma | €17.30 | €0.577 /capsule | 50 | |
| 13 | Equisalud L-Teanina Con Hipérico 50caps · 1/2 requirements | PromoFarma | €27.59 | €0.552 /capsule | 49 |
| 14 | Fepadiet Melatheanin 60 caps · 0/2 requirements | PromoFarma | €20.99 | €0.350 /capsule | 49 |
| 15 | Alfa Herbal L-Teanina Herbal 30 caps · 1/2 requirements | PromoFarma | €18.82 | €0.627 /capsule | 48 |
| 16 | PromoFarma | €26.69 | €0.890 /capsule | 47 | |
| 17 | PromoFarma | €28.25 | €0.942 /capsule | 47 | |
| 18 | Airbiotic Teanina Ab Complex 60 caps · 0/2 requirements | PromoFarma | €39.49 | €0.658 /capsule | 43 |
No product makes that cut
Out of the 18 in this table, none meets every filter that is currently set at the same time.
18 products in this table
What you are looking at. The score is 35 % price per capsule against the cheapest in the category, 35 % verifiable quality (certification, purity and additives), 20 % the category's own requirements and 10 % the buyers' rating at the store. Every product explains its mark line by line on its own page. How it is calculated.
Questions about theanine
Answered with the data on this page
- Which theanine should you buy?
- Now Foods L-teanina 100mg - 90 tabletas masticables from HSN, with 79 points out of 100 at €0.124/capsule. The mark is 35 % price against the cheapest in the category, 35 % verifiable quality (certification, purity and additives), 20 % the category's own requirements and 10 % the buyers' rating at the store, and no commercial deal moves the ranking.
- Which is the cheapest theanine?
- Now Foods L-teanina 100mg - 90 tabletas masticables from HSN, at €0.124/capsule (90 capsules pack for 11,17 €). It sits at verification level 1 out of 4. Cheap is not the same as well scored: price is 35 % of the mark and most of the rest is how verifiable its certification is.
- How much does a capsule of theanine cost?
- Between €0.124/capsule and €0.942/capsule across the 4 stores compared, with a median of €0.552/capsule. That is the price per capsule, not per pack: two tubs at the same price can cost twice as much as each other depending on what is inside.
- What certification should theanine have?
- Of the 18 products compared, 0 reach level 4 (the certification is backed by a third party: either we checked it with the body that issues it, or the product carries in its name a trademark that requires a third party behind it, such as Creapure or IFOS) and 0 reach level 3 (a lab report published by the brand itself). The remaining 18 stop at a certification claimed on the product page, or none at all. Only level 4 is checked against whoever issues the certification.
More specific questions about theanine2 comparisons — the same table, filtered
Other comparisons49 categories — same method
The raw data. This ranking is also available as JSON, with the collection date and a link to each product page. It can be cited and reused as long as you say where it comes from and which day the prices are from.