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Heiltropfen L-Theanine Powder 100 g

Lab verifiedLab: Eurofins CroatiakontrolaReport: 30 Apr 2026Batch: LT230126-100

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Protein / amino acidsEU seller✓ Lab verified

A 8.4/10 How we score →

Evidence note: No purity result: the published Eurofins reports cover heavy metals and microbiology only, so the L-theanine content of this powder has not been measured in any report we have seen. The heavy-metal results are all below the lab’s reporting limits.

Lab report

Lab-test status
Lab verified30 Apr 2026Report
Lab
Eurofins Croatiakontrola d.o.o., Zagreb (HR)
Eurofins analytical report AR-26-U6-017403-01 (L-Theanine 100 g; metals)
Batch
LT230126-100 (lot CY-LT20225101123, best before 10 Oct 2027)
Report date
30 Apr 2026
Heavy metals (mg/kg)
Pb <0.01 (well under the EU limit or below detection)Cd <0.003 (well under the EU limit or below detection)Hg <0.01 (well under the EU limit or below detection)As <0.01 (well under the EU limit or below detection)
Fillers
None
Heavy-metal colours: Well under the EU limit (below half) or below detection Near the EU limit (half the limit up to the limit) Over the EU limit Grey: no EU limit (arsenic), not tested, or the lab’s reporting limit is above the EU limitEU 2023/915 limits for food supplements: lead (Pb) 3.0, cadmium (Cd) 1.0, mercury (Hg) 0.10 mg/kg. Values in mg/kg. NT = not tested; c = calculated by us from µg per serving.
Ingredient
L-Theanine
Brand
Heiltropfen
Testing rule for this category
Third-party testing preferred
Status detail
An independent lab report or certification is referenced for this product.
Reviewer notes
Eurofins Croatiakontrola (Zagreb, HR), report AR-26-U6-017403-01, 30 Apr 2026, batch LT230126-100: lead <0.01, cadmium <0.003, mercury <0.01, total arsenic <0.01 mg/kg (all below the reporting limit). No purity (L-theanine content) result in the published reports. Separate Eurofins microbiology report (11 May 2026) within limits. EU seller (ships from Slovenia).
Product page
Heiltropfen (heiltropfen.de, SI)

⚠ 2 red flags

  • No purity (L-theanine content) result in the published lab reports.
  • The sample was supplied by the brand (sampler: client), not taken by the lab.

Purity & biohacker panel

Facts only, no scores. Lab: Eurofins Croatiakontrola d.o.o., Zagreb (HR) · Eurofins analytical report AR-26-U6-017403-01 (L-Theanine 100 g; metals) · batch LT230126-100 (lot CY-LT20225101123, best before 10 Oct 2027) · dated 2026-04-30 (report age 6 months).

Cleanliness checks

Free of fillers and additivesYes
Seller states single ingredient, no additives or sweeteners · seller page
Full ingredient list publishedYes
Single ingredient: L-theanine (100%) · seller page
Lead (Pb)Yes
<0.01 mg/kg (below the reporting limit), EU supplement limit ≤ 3.0 · lab report
Cadmium (Cd)Yes
<0.003 mg/kg (below the reporting limit), EU supplement limit ≤ 1.0 · lab report
Mercury (Hg)Yes
<0.01 mg/kg (below the reporting limit), EU supplement limit ≤ 0.10 · lab report
Arsenic (As)Yes
<0.01 mg/kg (below the reporting limit), total arsenic; no EU limit for supplements · lab report
MicrobiologyYes
Eurofins Croatiakontrola, 11 May 2026, same batch: aerobic plate count, Enterobacteriaceae, moulds, yeasts and sulphite-reducing anaerobes all <10 cfu/g; Salmonella not detected in 25 g; complies with EU criteria · lab report
PesticidesUnknown
Not in the published report · no source
Label accuracy (measured vs claim)Unknown
No purity or L-theanine content result in the published reports · no source

Biohacker parameters

Form
Powder (unflavoured) · seller page
Dose per serving
400 mg a day (one level 2.5 ml scoop) · seller page
Servings per pack
About 250 servings at 400 mg (100 g) · seller page
Price / cost per daily dose
€16.32 / 100 g ≈ €0.065 per day at 400 mg (calculated, price incl. VAT, checked 22 Oct 2026; can differ by delivery country). No UK seller on file. · seller page
Branded ingredient
Unknown · no source
Sourced / made in
Made by fermentation (seller); EU warehouse in Slovenia (Heiltropfen Lab d.o.o., Markovci) · seller page
Capsule material
None (powder) · seller page
Allergens
None declared (seller says allergen free) · seller page
Vegan
Unknown · no source
Third-party certifications
Unknown (accredited lab reports only) · no source
Report age
6 months · lab report

Unknown = not published or not verifiable. Prices from the linked seller page, checked 22 Oct 2026.

Testing evidence

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