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GABAplex

Swanson
4.7
★ ★ ★ ★ ★
(191 ratings)
GABA 250 mg
Theanine 50 mg
Glycine 250 mg
Tyrosine 100 mg
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Score78

Useful GABA and low cost make this a practical calming blend. Secondary doses are light, and tyrosine weakens its sleep focus.

How scoring works
Quantity:60 Capsule(s) • (60 servings)
Goals:
Stress Relief
Sleep Support

Score 78

Useful GABA and low cost make this a practical calming blend. Secondary doses are light, and tyrosine weakens its sleep focus.

How scoring works
$16.19($0.26 per serving)
iHerb
$ 16.19
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Analysis

GABA at 250 mg reaches the start of a useful range, with 250 mg glycine adding a second inhibitory amino acid. Taurine, theanine, and tyrosine broaden neurotransmitter support.

Theanine at 50 mg and taurine at 100 mg are modest, while glycine is far below gram-level sleep use. Tyrosine can feel activating, making the blend more suitable for daytime balance than consistent bedtime use.

One capsule and low serving cost support convenience and value. BioPerine may alter absorption, but source and purity details for the amino acids are absent.

Who is it for
  • Adults seeking an inexpensive calming amino-acid blend
  • People wanting GABA with glycine
  • Users who prefer one capsule
Best for
  • Stress-relief routines
  • Daytime calm
  • General amino-acid relaxation support

Pros

  • Provides 250 mg GABA
  • Includes 250 mg glycine
  • Convenient one-capsule serving
  • Low serving cost

Cons

  • Theanine and taurine are modest
  • Glycine is below a sleep-focused dose
  • Tyrosine may be activating
  • Amino-acid purity details are absent

Warnings

  • GABA may cause drowsiness
  • BioPerine can alter absorption of some medicines
  • Tyrosine may interact with MAO inhibitors or thyroid medicines

Nutrient quality

81 Highest impact

<p>The amino acids are clearly named, though premium-source and purity details are limited. GABA and glycine are useful blend amounts, while tyrosine, taurine, and theanine are modest.</p>.

Ingredient transparency

81 Highest impact

<p>Active amounts are stated and no proprietary blend hides a core dose. Missing excipient details and complete use directions leave the supplied label information incomplete.</p>.

Customer satisfaction

63 Moderate impact

<p>The supplied aggregate satisfaction average provides a broad signal, while the response volume determines how stable it appears. No comment-level evidence is available to assess repeated complaints or confirm intended-use experiences.</p>.

Value for money

83 Highest impact

<p>Useful active delivery supports favorable serving value. Each amino acid has a plausible role, though several small amounts reduce depth.</p>.

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Goals

Stress Relief
Impact
Highest effect
B+ Goal FitB+ Strength of SupportB- CoverageB+ Formula Quality

GABA, glycine, theanine, taurine, and tyrosine create a broad amino-acid and inhibitory-signaling formula for calm and mental balance. The GABA amount is useful, while glycine and theanine are below stronger standalone targets.

All active amounts are individually stated, and black pepper extract may affect absorption without hiding the core doses. Evidence for oral GABA is mixed, and the uneven dosing means the formula provides more breadth than consistent depth across every pathway.

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Sleep Support
Impact
Moderate effect
C+ Goal FitC+ Strength of SupportC CoverageC- Formula Quality

GABA, glycine, theanine, and taurine provide a calming amino-acid blend, while tyrosine may be activating for some users. The formula is relaxation focused but not specifically designed for circadian timing.

GABA reaches a useful amount, whereas glycine and theanine are far below stronger sleep targets. Clear individual amounts support assessment, but the overall depth is limited.

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Ingredients

IngredientAmount per serving
GABA
250 mg
L-Glycine
250 mg
L-Tyrosine
100 mg
Taurine
100 mg
L-Theanine
50 mg
Bioperine Nature's Thermonutrient
5 mg
Adults 18–50
Report overview
GABA · 250 mg OverallScore78
B- Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyB- Value

The formula provides a clearly disclosed GABA amount at the start of the preferred range. Its unbranded source and ordinary capsule are adequate rather than premium. A low serving cost gives it good value for a multi-ingredient calming blend.

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Theanine · 50 mg OverallScore76
B+ Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyD+ Value

The 50 mg L-theanine amount is clearly disclosed and may provide mild support within the broader formula. Generic sourcing provides no added purity or standardization assurance. Pricing is premium for the active amount delivered.

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Glycine · 250 mg OverallScore61
B- Active Ingredient Quality & BioavailabilityC+ Dose, Safety & Label TransparencyF Value

Clearly named L-glycine provides an isolated source, although no premium grade or purity certification is shown. Its 250 mg contribution is modest alone but works as part of the calming blend. High cost per gram limits value for anyone primarily seeking glycine.

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