Matcha’s Three Key Numbers: L-Theanine, Catechins & Caffeine
What each compound does in your product, the ranges published in the literature, and how to read them on a COA.
When two matcha COAs sit side by side, three numbers do most of the talking: L-theanine, total catechins, and caffeine. They decide whether your whisked drink tastes smooth or sharp, whether your latte blend needs added sweetness, and whether your finished product needs a caffeine declaration on the label. At Demeter Biotech we treat these three values as the fingerprint of each lot — and this article explains what moves them, so you can specify the profile your application needs instead of buying on grade words alone.
1. L-Theanine — the umami number
L-theanine is the amino acid behind matcha’s signature umami sweetness and its smooth, brothy mouthfeel. It is also the compound most sensitive to growing conditions: shading the tea plants before harvest raises L-theanine accumulation, which is precisely why shaded tencha tastes rounder than sun-grown leaf. Published laboratory analyses place L-theanine in matcha powder from roughly 18 up to about 45 mg/g, with ceremonial-type lots at the upper end. In formulation terms, a higher theanine number means more natural sweetness and less need to mask bitterness — the profile you want for whisked drinks and premium lattes.
2. Catechins — the astringency number
Catechins are the polyphenol family that gives green tea its brisk, astringent edge, with EGCG as the most abundant single member. Unlike theanine, catechins respond to sunlight: less shading generally means more of them. Published analyses place total catechins in matcha at roughly 100–150 mg/g, with EGCG commonly reported between about 13 and 59 mg/g depending on cultivar, harvest, and method. For your formulation, this changes the arithmetic: because matcha is consumed as the whole powdered leaf — not a steeped-and-discarded infusion — it delivers more of these compounds per serving than brewed green tea. In practice, higher-catechin lots taste bolder and more assertive, which suits baking, confectionery, and strongly flavored blends where dairy or sugar carries the profile.
3. Caffeine — the labeling number
Caffeine has a direct consequence for your label: in many markets, a finished product must declare it once it crosses a set threshold. Matcha’s published caffeine range is wide — roughly 19 to 44 mg/g of powder — and shading tends to push it upward along with theanine. Because the whole leaf is consumed, a 2 g serving of matcha delivers more caffeine than a steeped cup of green tea made from the same leaf weight. If your application is an RTD beverage or anything with a “with caffeine” positioning, you need the batch-specific COA value, not a generic average, to build a defensible label.
4. The shading seesaw
The three numbers are linked: shading shifts the leaf’s chemistry in one coordinated move. Research on shaded tea shows L-theanine and caffeine rise while catechin synthesis falls — the biochemical basis of the umami-forward, low-bitterness profile that ceremonial-type matcha is known for.
5. Typical ranges at a glance
| Compound | Published range (powder, dry weight) | What it drives in your product |
|---|---|---|
| L-Theanine | ~18–45 mg/g | Umami sweetness, smoothness; high values suit whisked drinks and premium lattes |
| Total catechins | ~100–150 mg/g | Astringency and briskness; bolder flavor for baking and confectionery |
| EGCG | ~13–59 mg/g | The dominant single catechin; varies most between studies |
| Caffeine | ~19–44 mg/g | Label declaration thresholds; batch COA needed for RTD and energy positioning |
Ranges compiled from published matcha composition studies (Kochman et al. 2021). Values vary by cultivar, harvest, shading, and analytical method — always confirm by batch COA.
6. Reading a COA: four checks that matter
- 1Method — the three values should come from HPLC analysis, stated on the certificate.
- 2Units — check whether values are given in mg/g or % (2.5% theanine = 25 mg/g) before comparing suppliers.
- 3Batch vs typical — a “typical value” sheet is marketing; the batch-specific COA is the document your QC and label teams can rely on.
- 4Fit to application — match the theanine-to-catechin balance to your use: high-theanine for straight drinks, higher-catechin for flavored or baked formats.
7. How we support this at Demeter
Our USDA + EU Organic ceremonial matcha is built from shaded first-flush tencha from our own tea gardens, stone-milled below 40°C, and tested batch by batch — Eurofins for 600+ residue parameters, with compound values available on request so your formulation team works from real numbers. Halal certification is available, and private-label OEM runs from drum to retail tin.
Demeter Ceremonial Grade Matcha (A-10A)
Shaded first-flush tencha, stone-milled, Eurofins-tested. Batch COA covers residues; compound values (theanine, catechins, caffeine) available for your formulation review.
Same Powder, Retail Tin Format
Request the 50 g tin as a QC reference sample and run it against your current supply’s COA — the three numbers will tell you more than any brochure.
8. When you inquire, here are the 3 things we ask
- 1Application — whisked drink, latte base, or bakery? This sets which end of the theanine-catechin balance you need.
- 2Compound targets & certifications — any theanine/caffeine specification for your label, plus USDA, EU Organic, or Halal requirements.
- 3Volume & pack — drum, tin, or sachet, so the sample and the COA match the commercial lot you will receive.
References
- Chen, M. et al. (2022). Shading treatment modifies the metabolite profile of tea leaves: increased theanine and caffeine, decreased catechins. International Journal of Molecular Sciences, 23(22), 14169. doi:10.3390/ijms232214169
- Lee, J.-E. et al. (2013). Metabolomic unveiling of the shading effect on the biosynthesis of flavor and health compounds in Camellia sinensis. Journal of Agricultural and Food Chemistry, 61(2), 532–538. doi:10.1021/jf304161y
- Kochman, J., Jakubczyk, K., Antoniewicz, J., Mruk, H., & Janda, K. (2021). Health Benefits and Chemical Composition of Matcha Green Tea: A Review. Molecules, 26(1), 85. doi:10.3390/molecules26010085
This article describes ingredient composition and processing only. It is not a statement of efficacy, health claim, or medical advice. Compound ranges cited are from published literature and vary by cultivar, harvest, and analytical method; actual values for any lot are confirmed only by its batch COA. Caffeine declaration requirements differ by market — consult your local regulatory team.
Post time: Sep-29-2026
