Catalog edition · October 15, 2026How everyday comfort gadgets work · Sleep · Massage · Feet · Supplements · Direct-sale checks
Advanced Biology Post
Part SP-04Supplements & BasicsL-theanine softgelsDietary supplement

Sports Research L-Theanine 200 mg with Suntheanine, 60 Softgels

One softgel holding 200 mg of L-theanine, an amino acid found in tea leaves, in organic coconut oil. This entry reads the label, looks up the ingredient’s FDA GRAS notice, and describes what the human trials did and did not measure.

Advanced Biology Post Editorial Team

Exploded view

Part SP-04 · callouts from the label and the listing · Oct 15, 2026
Sports Research L-Theanine 200 mg jar, 60 softgels, black label with a blue Double Strength tag
  1. 1CapA black screw cap on a wide jar that holds the 60 softgels.
  2. 2Double StrengthThe brand’s name for the 200 mg amount; the label explains it as twice a standard 100 mg L-theanine softgel.
  3. 3200MG PER SERVINGOne softgel is one serving and carries 200 mg of L-theanine.
  4. 4Suntheanine®The branded L-theanine ingredient made by Taiyo, the company behind the ingredient’s FDA GRAS notice.
  5. 560 Softgels | Dietary SupplementThe count and the legal category: 60 one-softgel servings, sold as a dietary supplement.
Parts named as on the label and Amazon listing B00TXY32FY, read Oct 15, 2026. The photo is the listing’s main image; we erased one printed benefit line between the serving line and the gluten-free line, which leaves the gap you see.

Spec plate

60 softgels, UPC 023249010173 · from the label and listing · Oct 15, 2026
Model
L-Theanine 200 mg with Suntheanine, 60 softgels
Form
Liquid-filled softgel
Serving
1 softgel; 60 servings per container
L-theanine per serving
200 mg (Suntheanine); Daily Value not established
Other ingredients
Organic virgin coconut oil, softgel (gelatin, vegetable glycerin, purified water), organic beeswax
Allergen line
Contains: tree nuts (coconut)
Label free-from lines
Gluten free, non-GMO; “Non-GMO Tested by Nutrasource (05/2016)” on a gallery image
Directions
Adults, 1 softgel daily with or without food
Ingredient record
FDA GRAS notice GRN 209 (L-theanine, Taiyo): “FDA has no questions”, Feb 5, 2007
Testing
“Third Party Tested”: the brand’s claim; no certifier named on the label
Jar size
2.13 x 2.13 x 4 in, 3.2 oz (listing)
Regulatory status
Dietary supplement; not reviewed by the FDA before sale

Source: the Supplement Facts image and product fields on Amazon listing B00TXY32FY, and FDA’s GRAS notice inventory entry for GRN 209, read Oct 15, 2026. A GRAS notice concerns use as a food ingredient; it is not an FDA review of this supplement.

01How it’s taken, and what’s in a serving

One softgel, once a day: the useful questions are what the 200 mg is, where it comes from, and what carries it.

  1. An amino acid from tea

    L-theanine is an amino acid that occurs naturally in tea leaves [3]. A serving of this product supplies 200 mg of it with no caffeine in the ingredient list [1].

  2. A branded ingredient with a GRAS file

    Suntheanine is Taiyo’s L-theanine. In GRAS notice 209, Taiyo concluded that L-theanine is generally recognized as safe as an ingredient in several food categories at up to 250 mg per serving, and FDA replied on Feb 5, 2007 that it had no questions [2]. That letter covers food use; it is not an evaluation of this softgel.

  3. Carried in coconut oil

    The 200 mg sits in organic virgin coconut oil with organic beeswax inside a gelatin shell, which is why the label carries a tree-nut (coconut) allergen line [1].

  4. Short time in the body

    The NIH LactMed entry gives L-theanine a half-life of about one hour and says it should be mostly gone from breast milk within 3 to 5 hours [5].

02Fit check

Good fit

  • Adults who want L-theanine on its own at a fixed 200 mg, one softgel a day
  • People who want the tea amino acid without tea’s caffeine: none is listed
  • Buyers who prefer a named, documented ingredient (Suntheanine, GRN 209)

Poor fit

  • Anyone allergic to coconut: the label lists it as a tree-nut allergen
  • Vegetarians and vegans: the shell is gelatin
  • Anyone expecting a dependable, measurable effect: the trials below are small and mixed

Check first

  • The label says to consult a qualified healthcare professional before use, especially if you are pregnant, nursing, have a diagnosed medical condition or take a prescription medication [6]
  • Breastfeeding: LactMed says it is probably best to avoid L-theanine supplements while nursing a newborn or preterm infant [5]
  • Children: the directions are for adults only

03What the trials measured

The research is mostly short, small trials in healthy adults. A 2026 systematic review and meta-analysis in Molecular Psychiatry pooled 31 randomized, placebo-controlled trials with 1,168 participants [3]. Its clearest result was on a lab task: a single 200 mg dose taken 30–60 minutes before testing was followed by faster choice reaction times than placebo. Its other measures were smaller, inconsistent or, the authors noted, leaned heavily on studies at high risk of bias; there was no effect on fatigue, and no serious adverse events were reported. One author disclosed founding a company that sells dietary supplements.

A smaller 2025 meta-analysis in the Journal of Clinical Medicine found only five eligible trials with 148 healthy adults; some attention tasks moved, others did not, and the authors called the result “promising, but not completely conclusive” [4]. Neither review tested this product, and both called for further, higher-quality trials; the smaller one asked specifically for larger trials of standardized products.

The listing and the jar make function claims that we do not repeat. As on every supplement label: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. The FDA does not test supplements before they are sold [7].

Before you buy

Check the allergen line: the oil is coconut, which the label declares as a tree nut. If you take medication, are pregnant or are nursing, ask a clinician first, as the label itself advises [6]. The Amazon listing is non-returnable except for damaged or defective items.

04Taking and storing it

These steps follow the label and the sources above; they describe use and storage, not a promised result.

  1. Read the allergen and medicine notes

    Confirm you can take coconut and gelatin, and check with a clinician if you take medication [1][6].

  2. One softgel a day

    The label’s serving is one softgel daily, with or without food [1].

  3. Store it at room temperature

    The label says to store it at room temperature in a dry place, protected from excessive heat, freezing, humidity and light, out of reach of children and pets, and not to use it if the safety seal is damaged or missing [6].

05Price and where it is sold

On Oct 15, 2026 the 60-softgel jar was $19.95 on Amazon, sold by Sports Research and shipped from Amazon, in stock, with the return line “Non-returnable due to Food safety reasons” (a refund or replacement only if the item arrives damaged or defective). A subscribe-and-save price was also offered. That is about 33 cents per softgel. See the 60-softgel listing on Amazon. As an Amazon Associate we earn from qualifying purchases.

06Who should look elsewhere

  • Anyone with a coconut allergy, or who avoids gelatin
  • Anyone nursing a newborn or preterm infant [5]
  • Anyone hoping for a guaranteed change in how they feel: the trials do not support that expectation [3][4]

Sources

  1. Amazon. Sports Research L-Theanine 200 mg with Suntheanine, 60 softgels, listing B00TXY32FY: Supplement Facts image, ingredients, directions, product details, seller and return line. Accessed Oct 15, 2026 (linked in the price section above).
  2. U.S. Food and Drug Administration. GRAS Notice Inventory, GRN No. 209, L-theanine (Taiyo International, Inc.): intended use, filing Aug 9, 2006, closure Feb 5, 2007, “FDA has no questions”. Accessed Oct 15, 2026. link
  3. Systematic review and meta-analysis of 31 randomized trials of L-theanine (1,168 participants). Molecular Psychiatry, 2026;31(11):6592-6602. PMID 42410082. PubMed
  4. Meta-analysis of five randomized, placebo-controlled trials of L-theanine and attention tasks in healthy adults. Journal of Clinical Medicine, 2025;14(21):7710. PMID 41227106. PubMed
  5. NIH, Drugs and Lactation Database (LactMed). Theanine. Updated May 15, 2025. PMID 40460226. link
  6. NIH Office of Dietary Supplements. Dietary Supplement Label Database: Sports Research L-Theanine 200 mg, 60 softgels, label 326262 (UPC 023249010173): caution, storage and suggested-use text. Accessed Oct 15, 2026. link
  7. U.S. Food and Drug Administration. Questions and Answers on Dietary Supplements (premarket review, testing, the required disclaimer). Accessed Oct 15, 2026. link

This entry is educational and is not medical advice. It describes what is in a product and what its label says; it does not say the product will change any health condition. Talk to a clinician or pharmacist before taking a supplement if you take medication, are pregnant or breastfeeding, or manage a health condition.