California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules vs Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g)
California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules (#1, best overall) vs Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g) (#4): in our L-Theanine for Calm Focus scoring the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules…
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California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules
$9.43Check price at iHerbRead full review
Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g)
$15.95Check price at iHerbRead full reviewTopsFive comparison scores
Side by side
| California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules | Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g) | |
|---|---|---|
| Price | $9.43 | $15.95 |
| L-Theanine Per Serving | 100 mg | 200 mg |
| L-Theanine Form | AlphaWave® highly purified L-theanine | Generic L-theanine powder; branded purity process not disclosed |
| Serving Size | 1 capsule | 1 scoop (0.2 g) |
| Servings Per Container | 60 | 500 |
| Caffeine | 0 mg; none listed | 0 mg; none listed |
| Format / Vegan | Hypromellose veggie capsule; vegan | Loose unflavored powder; labeled vegetarian |
| Other Ingredients | Microcrystalline cellulose, hypromellose capsule, stearic acid, silicon dioxide | None |
| Testing / Certification | Published iTested report for lot 3533; Eurofins and ABC Testing; report dated 2018 | Label states third-party tested and GMP compliant; no named certification or published product-specific COA linked |
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 California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules and the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g) made our Top 5 L-Theanine for Calm Focus, at #1 (best overall) and #4. It has the best weighted balance of branded form, label clarity, published product-specific evidence, and price. Its roughly 25,000 iHerb reviews reinforce buyer trust, but quality criteria—not popularity—drive the rank. Exceptional value, a 200 mg serving, and a one-ingredient label earn fourth place. It remains below the branded products because neither L-isomer process documentation nor a product-specific laboratory report is published on the iHerb page.
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 California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules totals 8.3 out of 10 and the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g) 6.7. The widest gap is Third-Party Testing, where the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules scores 8 against 3 for the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g) — independent certification or a published certificate of analysis. Form & Bioavailability also separates them: 10 for the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules versus 6 for the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g). The Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g) claws back ground on Dose vs Research, Value and Label Transparency.
On paper, the specifications that actually differ: L-Theanine Per Serving — 100 mg on the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules versus 200 mg on the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g); L-Theanine Form — AlphaWave® highly purified L-theanine on the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules versus Generic L-theanine powder; branded purity process not disclosed on the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g); Serving Size — 1 capsule on the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules versus 1 scoop (0.2 g) on the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g); Servings Per Container — 60 on the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules versus 500 on the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g); Format / Vegan — Hypromellose veggie capsule; vegan on the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules versus Loose unflavored powder; labeled vegetarian on the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g); Other Ingredients — Microcrystalline cellulose, hypromellose capsule, stearic acid, silicon dioxide on the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules versus None on the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g). They match on Caffeine.
Pricing as of August 5, 2026: $9.43 for the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules and $15.95 for the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g), a $6.52 difference in the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules's favor. Owners praise the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules for branded AlphaWave L-theanine with 100 mg fully disclosed per capsule and published product-specific iTested report lists a 100 mg HPLC potency result; the most common complaint is 100 mg is the bottom of the requested research-dose range. Owners praise the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g) for 200 mg serving with no other ingredients and approximately $0.03 per serving and 500 servings per container; the most common complaint is generic L-theanine without a disclosed branded L-isomer process.
California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules
- Branded AlphaWave L-theanine with 100 mg fully disclosed per capsule
- Published product-specific iTested report lists a 100 mg HPLC potency result
- Vegan capsule with no caffeine and broad allergen exclusions
- 100 mg is the bottom of the requested research-dose range
- Available iTested report is dated 2018 and does not document the current lot
Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g)
- 200 mg serving with no other ingredients
- Approximately $0.03 per serving and 500 servings per container
- Vegetarian, gluten-free, non-GMO, and caffeine-free labeling
- Generic L-theanine without a disclosed branded L-isomer process
- Measuring a 0.2 g scoop can be less repeatable than using a premeasured capsule
Which should you buy?
The California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules is the better fit for buyers prioritizing branded L-theanine plus a published product-specific report and buyers wanting a 100 mg premeasured serving — it is the higher-scoring pick here, chiefly for Third-Party Testing and Form & Bioavailability. The Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g) is the better fit for high-volume buyers prioritizing cost per active milligram and buyers wanting a filler-free powder with adjustable portions, and the stronger choice if Dose vs Research and Value matter more to you than the overall score. Since the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules is both the higher scorer and $6.52 cheaper, the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g) only makes sense for high-volume buyers prioritizing cost per active milligram. The California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules is a poor fit for buyers wanting 200 mg in one capsule; the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g) is a poor fit for buyers prioritizing Suntheanine or AlphaWave.
Choose the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules if
- Buyers prioritizing branded L-theanine plus a published product-specific report
- Buyers wanting a 100 mg premeasured serving
Skip it if
- Buyers wanting 200 mg in one capsule
- Buyers requiring a certificate matching the current lot
Choose the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g) if
- High-volume buyers prioritizing cost per active milligram
- Buyers wanting a filler-free powder with adjustable portions
Skip it if
- Buyers prioritizing Suntheanine or AlphaWave
- People who prefer premeasured capsules
Common questions
Is the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules better than the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g)?
In our L-Theanine for Calm Focus ranking the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules scores higher overall, 8.3 to 6.7, with the biggest advantage in Third-Party Testing. The Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g) is stronger on Dose vs Research and Value, so it is the better pick if those matter most to you.
How much more does the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g) cost than the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules?
$6.52 more as of August 5, 2026: $15.95 for the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g) against $9.43 for the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules. Prices move, so the merchant page shows the current figure.
What is the main difference between the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules and the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g)?
The headline spec difference is L-Theanine Per Serving: 100 mg on the California Gold Nutrition, L-Theanine, Featuring AlphaWave, 100 mg, 60 Veggie Capsules versus 200 mg on the Nutricost, L-Theanine, Unflavored, 3.6 oz (100 g). In use, the gap that matters most is Third-Party Testing (8 vs 3 in our scoring): independent certification or a published certificate of analysis.