Formulation comparison

L-theanine products compared

Compare theanine-only capsules with an inositol combination. Similar milligrams do not make finished preparations interchangeable.

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NOW Foods L-Theanine 200 mg

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$15.70List $25.9940% at last checkSave $10.29New
Last checked Price details

Item price · tax & shipping not included.

Seller at last check: Amazon.com

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.

NOW Foods L-Theanine 200 mg

Theanine and inositol capsule

Current Amazon listing details are unavailable.

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Formulation & considerations

NOW declares 200 mg L-theanine and 100 mg inositol per capsule.

Why choose it: NOW Foods L-Theanine 200 mg pairs a theanine and inositol capsule format with a 60 capsules pack. A ready-to-take format keeps preparation simple, with no powder to mix or liquid to measure.

Consider: The old export called this Suntheanine; the inspected manufacturer panel does not establish that branded identity.

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Jarrow Formulas Theanine 200 mg

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$22.99List $25.9912% at last checkSave $3.00New
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Item price · tax & shipping not included.

Seller at last check: Amazon.com

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.

Jarrow Formulas Theanine 200 mg

Vegetarian capsule

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Formulation & considerations

Jarrow declares 200 mg L-theanine per capsule in its 60-capsule product.

Why choose it: Jarrow Formulas Theanine 200 mg pairs a vegetarian capsule format with a 60 Capsules pack. A ready-to-take format keeps preparation simple, with no powder to mix or liquid to measure.

Consider: Do not carry over the archive’s Suntheanine claim without current label evidence.

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THORNE Theanine 200 mg

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$68.00New
Last checked Price details

Item price · tax & shipping not included.

Seller at last check: Pattern.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.

THORNE Theanine 200 mg

Capsule

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Formulation & considerations

Thorne declares 200 mg L-theanine per capsule and 90 servings on its product page.

Why choose it: THORNE Theanine 200 mg pairs a capsule format with a 90 Capsules pack. A ready-to-take format keeps preparation simple, with no powder to mix or liquid to measure.

Consider: This page does not establish that Thorne’s retail preparation matches the tablets in an ingredient trial.

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How to use this comparison

Compare the declared form, serving unit, added ingredients and unresolved label differences. These are manufacturer descriptions associated with candidate ASINs from an older index. The exact Amazon packages have not been matched. Compare theanine-only capsules with an inositol combination. Similar milligrams do not make finished preparations interchangeable.

Choosing with confidence

No live availability, price, purity, certification or efficacy ranking is asserted. Current manufacturer descriptions can differ from archived retail records. Read the individual limitations before interpreting a comparison.

Sources and related reading

Read the ingredient evidence · Our methodology