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The best theanine from PromoFarma: 11 products by price per capsule
The short answer. Of the 11 products that pass this filter, the highest scoring is Fepadiet Fepa L-Teanina 60caps from PromoFarma: €0.250/capsule and verification level 1 out of 4. The cheapest per capsule is LONGLIFE L-Theanine 60 caps from PromoFarma, at €0.360/capsule. The selection runs from €0.360/capsule to €0.942/capsule, with a median of €0.552/capsule.
The 11 theanine products sold by PromoFarma, scored with the same score as the rest of the site. Its median is €0.552/capsule, the same as the market compared here (€0.552/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.
The three that stand out
LONGLIFE L-Theanine 60 caps
€0.360/capsuleNo third-party seal
€0.360 per capsule: the cheapest of those that meet the category's requirements and are not underdosed.
At PromoFarma · see how its score breaks down
Fepadiet Fepa L-Teanina 60caps
€0.250/capsuleNo third-party seal
Score 59 out of 100: the highest mark, with 35 % of the weight on price per capsule.
At PromoFarma · see how its score breaks down
The full selection
11
products compared
from €0.360 to €0.942
per capsule
0
at verified level 4
Filter and sort
| # | Product | Store | |||
|---|---|---|---|---|---|
| 01 | Fepadiet Fepa L-Teanina 60caps · 1/2 requirements | PromoFarma | €14.99 | €0.250 /capsule | 59 |
| 02 | Plantis Teanin 60 Cápsulas · 0/2 requirements | PromoFarma | €13.93 | €0.232 /capsule | 55 |
| 03 | PromoFarma | €21.63 | €0.360 /capsule | 54 | |
| 04 | PromoFarma | €15.39 | €0.513 /capsule | 50 | |
| 05 | PromoFarma | €17.30 | €0.577 /capsule | 50 | |
| 06 | Equisalud L-Teanina Con Hipérico 50caps · 1/2 requirements | PromoFarma | €27.59 | €0.552 /capsule | 49 |
| 07 | Fepadiet Melatheanin 60 caps · 0/2 requirements | PromoFarma | €20.99 | €0.350 /capsule | 49 |
| 08 | Alfa Herbal L-Teanina Herbal 30 caps · 1/2 requirements | PromoFarma | €18.82 | €0.627 /capsule | 48 |
| 09 | PromoFarma | €26.69 | €0.890 /capsule | 47 | |
| 10 | PromoFarma | €28.25 | €0.942 /capsule | 47 | |
| 11 | Airbiotic Teanina Ab Complex 60 caps · 0/2 requirements | PromoFarma | €39.49 | €0.658 /capsule | 43 |
No product makes that cut
Out of the 11 in this table, none meets every filter that is currently set at the same time.
11 products in this table
Why one is cheaper than the other
Factor by factor, with both stores’ data
PromoFarma costs 26 % more per capsule than All other stores (€0.552/capsule against €0.437/capsule, medians of both catalogues). That difference does not come out of nowhere. These are the data that explain it, with each store’s figure alongside: capsules per pack (median), products with declared additives.
| Factor | PromoFarma | All other stores |
|---|---|---|
| Capsules per pack (median)All other stores sells bigger packs, and a big pack spreads the same tub, the same label and the same shipping over more capsules. Part of the price gap per capsule is this and not a discount: comparing one store’s small pack with the other’s large one inflates the gap. | 50 caps. | 80 caps. |
| Products with declared additivesWhat the pages of both declare: anti-caking agents, colourings. An additive is not fraud, but it takes up grams that are not active ingredient and is cheaper than the active ingredient: where more additive is declared, the price per capsule drops without the product being better. | 0 % | 29 % |
| Median rating at the storeBased on 1 reviews at PromoFarma and 5 at All other stores. These are the store’s own ratings, which is judge and party: they help spot a product that arrives damaged or tastes awful, not decide which formula is better. | 5/5 | 4.8/5 |
None of these factors is an accusation. They are medians of what each store publishes on its pages on the day prices were collected: where a page does not declare a figure, that store does not count in that row instead of counting as a zero. A specific product can contradict its store’s median, and that is what the full table is for. How all of this is calculated.
This is a filter, not another ranking. The score that sorts this table is exactly the same as in the full theanine comparison: the only thing removed here is the products that do not meet the criterion above. How it is calculated.
Questions about this theanine selection
Answered with the data on this page
- Which is the best theanine in this selection?
- Fepadiet Fepa L-Teanina 60caps from PromoFarma, with 59 points out of 100 at €0.250/capsule. The 11 theanine products sold by PromoFarma, scored with the same score as the rest of the site. Its median is €0.552/capsule, the same as the market compared here (€0.552/capsule).
- Which is the cheapest per capsule?
- LONGLIFE L-Theanine 60 caps from PromoFarma, at €0.360/capsule (60 capsules pack for €21.63). It is at verification level 1 out of 4: price is only 35 % of the mark.
- How was this selection made?
- The 11 theanine products sold by PromoFarma, scored with the same score as the rest of the site. Its median is €0.552/capsule, the same as the market compared here (€0.552/capsule). The order within the table is the usual score: 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. Affiliate links do not enter the calculation. Prices collected on October 15, 2026.
Other ways to look at theanine
Same dataset, another question