Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets vs EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules
Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets (#2, best premium) vs EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules (#5): in our L-Theanine for Calm Focus scoring the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets…
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Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets
$18.87Check price at iHerbRead full review
EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules
Check price at iHerbRead full reviewTopsFive comparison scores
Side by side
| Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets | EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules | |
|---|---|---|
| Price | $18.87 | — |
| L-Theanine Per Serving | 200 mg | 200 mg |
| L-Theanine Form | Suntheanine® enzymatically produced L-theanine | Generic L-theanine; branded purity process not disclosed |
| Serving Size | 2 chewable tablets | 1 capsule |
| Servings Per Container | 30 | 60 |
| Caffeine | 0 mg; none listed | 0 mg; none listed |
| Format / Vegan | Chewable tablets; suitable for vegans | Veggie capsule; vegan formula |
| Other Ingredients | Organic cane sugar, xylitol, stearic acid, silica, natural tropical flavor, citric acid, magnesium stearate | Cellulose, vegetable stearates, rice flour, silicon dioxide |
| Testing / Certification | Isura non-GMO documentation and mass-spec lab verification; no USP/NSF certificate or downloadable current-lot COA on the page | No recognized finished-product certification or published product-specific COA linked on iHerb |
How they differ in real use
Built from our l theanine for calm focus scoring, each product's published specifications, and verified owner feedback — not hands-on testing.
Both the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets and the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules made our Top 5 L-Theanine for Calm Focus, at #2 (best premium) and #5. Its Suntheanine form, 200 mg serving, and named Isura verification are strong on the heavily weighted criteria. It ranks below the winner because of its substantially higher active-ingredient cost and added-sugar chewable formulation. Its 200 mg dose, vegan capsule, low price, and roughly 5,000 iHerb reviews make it the strongest remaining generic capsule. Weak testing documentation and undisclosed L-isomer process keep it behind the other selections.
We score l-theanine for calm focus on Third-Party Testing (30%), Form & Bioavailability (25%), Dose vs Research (20%), Label Transparency (15%) and Value (10%). On that basis the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets totals 7.9 out of 10 and the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules 6. The widest gap is Third-Party Testing, where the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets scores 7 against 2 for the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules — independent certification or a published certificate of analysis. Form & Bioavailability also separates them: 10 for the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets versus 6 for the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules. The EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules claws back ground on Value.
On paper, the specifications that actually differ: L-Theanine Form — Suntheanine® enzymatically produced L-theanine on the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets versus Generic L-theanine; branded purity process not disclosed on the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules; Serving Size — 2 chewable tablets on the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets versus 1 capsule on the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules; Servings Per Container — 30 on the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets versus 60 on the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules; Format / Vegan — Chewable tablets; suitable for vegans on the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets versus Veggie capsule; vegan formula on the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules; Other Ingredients — Organic cane sugar, xylitol, stearic acid, silica, natural tropical flavor, citric acid, magnesium stearate on the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets versus Cellulose, vegetable stearates, rice flour, silicon dioxide on the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules; Testing / Certification — Isura non-GMO documentation and mass-spec lab verification; no USP/NSF certificate or downloadable current-lot COA on the page on the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets versus No recognized finished-product certification or published product-specific COA linked on iHerb on the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules. They match on L-Theanine Per Serving and Caffeine.
The Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets lists at $18.87; the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules's current price is on the merchant page. Owners praise the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets for 200 mg Suntheanine serving directly matches several human-trial doses and isura mass-spec laboratory verification and non-GMO documentation are identified; the most common complaint is costs $0.63 per 200 mg serving, the highest cost in this list. Owners praise the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules for 200 mg of fully disclosed L-theanine per capsule and vegan formula with no caffeine; the most common complaint is generic L-theanine without Suntheanine or AlphaWave identification.
Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets
- 200 mg Suntheanine serving directly matches several human-trial doses
- Isura mass-spec laboratory verification and non-GMO documentation are identified
- Vegan chewable format with no caffeine
- Costs $0.63 per 200 mg serving, the highest cost in this list
- Two-tablet serving contains 3 g added sugar plus xylitol and flavoring
EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules
- 200 mg of fully disclosed L-theanine per capsule
- Vegan formula with no caffeine
- Approximately $0.12 per 200 mg serving
- Generic L-theanine without Suntheanine or AlphaWave identification
- No recognized certification or published product-specific COA linked on iHerb
Which should you buy?
The Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets is the better fit for buyers prioritizing Suntheanine and a 200 mg labeled serving and people who prefer chewables over capsules or powder — it is the higher-scoring pick here, chiefly for Third-Party Testing and Form & Bioavailability. The EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules is the better fit for budget buyers wanting 200 mg in one vegan capsule and buyers who want to control caffeine separately, and the stronger choice if Value matters more to you than the overall score. The Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets is a poor fit for buyers avoiding added sugar or xylitol; the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules is a poor fit for buyers prioritizing branded L-isomer documentation.
Choose the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets if
- Buyers prioritizing Suntheanine and a 200 mg labeled serving
- People who prefer chewables over capsules or powder
Skip it if
- Buyers avoiding added sugar or xylitol
- Value-focused buyers seeking a low cost per active milligram
Choose the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules if
- Budget buyers wanting 200 mg in one vegan capsule
- Buyers who want to control caffeine separately
Skip it if
- Buyers prioritizing branded L-isomer documentation
- Buyers requiring published laboratory results
Common questions
Is the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets better than the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules?
In our L-Theanine for Calm Focus ranking the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets scores higher overall, 7.9 to 6, with the biggest advantage in Third-Party Testing. The EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules is stronger on Value, so it is the better pick if that matters most to you.
What is the main difference between the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets and the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules?
The headline spec difference is L-Theanine Form: Suntheanine® enzymatically produced L-theanine on the Natural Factors, Stress-Relax, Suntheanine L-Theanine, 100 mg, 60 Chewable Tablets versus Generic L-theanine; branded purity process not disclosed on the EVLution Nutrition, L-Theanine, 200 mg, 60 Veggie Capsules. In use, the gap that matters most is Third-Party Testing (7 vs 2 in our scoring): independent certification or a published certificate of analysis.