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💼 Stay sharp, stay serene — your daily edge in a hectic world.
Swanson Double Potency Suntheanine L-Theanine delivers a potent 200 mg dose of patented Suntheanine per vegetarian capsule, designed to promote calm focus and balanced wellbeing. Manufactured in GMP-certified facilities with rigorous third-party testing, this gluten-free supplement supports stress relief for busy professionals seeking reliable, science-backed mental clarity. Each bottle contains 60 capsules with a 24-month shelf life, reflecting Swanson’s 50+ years of trusted quality in health supplements.










| ASIN | B00DECMJL4 |
| Age Range Description | Adult |
| Allergen Information | Gluten Free |
| Best Sellers Rank | #65,862 in Health & Household ( See Top 100 in Health & Household ) #2,693 in Blended Vitamin & Mineral Supplements |
| Brand | Swanson |
| Brand Name | Swanson |
| Container Type | Bottle |
| Customer Reviews | 4.4 out of 5 stars 137 Reviews |
| Diet Type | Vegetarian |
| Dosage Form | Capsule |
| Flavor | Unflavored |
| Item Dimensions | 1.97 x 1.97 x 4.72 inches |
| Item Form | Capsule |
| Item Weight | 0.04 kg |
| Manufacturer | OfficeMarket |
| Manufacturer Part Number | SWU816 |
| Material Features | Vegetarian |
| Model Number | Swanson-SWU816 |
| Number of Items | 1 |
| Pill Coating | Enteric |
| Primary Supplement Type | Suntheanine L-Theanine |
| Product Benefits | Stress Relief |
| Special Ingredients | L-Theanine |
| Supplement Formulation | Individual Supplement |
| Total Servings Per Container | 60 |
| UPC | 087614028163 |
| Unit Count | 60 Count |
H**N
It works well.
Keeps me calm from my anxieties. Works ok.
E**V
Great for calming over active brains.
First remedy that actually rests my brain and results in great sleep after 30 years of not so great sleep.
C**G
Good price for Suntheanine
I believe that I may have elevated cortisol levels, especially during allergy season and the heat of summer, that causes extreme reactions that leave me itching and hurting. I’ve been trying this to see if it helps. So far, I believe the results are good and the price isn’t bad, especially for the Suntheanine version of l-theanine. I do sometimes feel a bit tired, but some coffee seems to do the trick. I’m satisfied with this Swanson product.
M**E
It helps
I think it's helping me with anxiety.
R**.
Great for sleep!!
This is amazing for better sleep quality especially when paired with Magnesium glycinate. I highly recommend this brand. The Suntheanine seems to absorb better than regular L-theanine.
G**7
Not the best, not the worst.
Not as good as other brands I've Tried. I Used Country life L-theanine with b-complex added. Worked very well. Switched to this one on a recommendation. No go for me. Country life is way better IMO.
C**N
Good stuff
I like it, very good
M**S
Did not help me! Adverse reaction.
This doesn’t help me. Twice took and felt miserable ☹️. Suntheanine is the culprit for my adverse reaction. No help for calming therefore I will stay with just the L-THEAN Only! Trashed the bottle!
Trustpilot
1 month ago
1 month ago