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Amino Acid Double Potency Suntheanine LTheanine 200 Milligrams 60 Veg Capsules

Prices as of September 26, 2026, as listed by each retailer — verify the current price on the retailer's site before purchase.

Price history tracked at Macy's price tracker

14-day low
$25.49
Sep 13 · Macy's
Best price
$25.49
−0% vs high
14-day high
$25.49
All stores
$25$25$25
Sep 13Sep 26
  • Macy's
Lowest in 14 days: $25.49 at Macy's. Highest: $25.49. Current best is 0% below the 14-day high.

About this product

Swanson Double Potency Suntheanine L-Theanine is a dietary supplement containing 200 milligrams of L-theanine per capsule, derived from tea plants. This amino acid is formulated to support calm alertness by stimulating alpha wave activity in the brain. The product uses a patented process to enhance its calming properties and is designed based on clinical research showing effectiveness at this dosage level. Each capsule is made in the USA in GMP-certified facilities with third-party testing for purity and potency.

  • 200 mg per capsule
  • patented Suntheanine formula
  • supports calm alertness
  • third-party tested
  • made in USA
  • GMP certified facilities

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Amino Acid Double Potency Suntheanine — Price History