Price History (90 days)
Quick Facts
- Form
- Capsules
- Dose
- 250mg L-theanine
- Serving
- 1 capsule
- Servings
- 120
- Vegan
- Yes
- Made in
- UK
Bulk L-Theanine Capsules 250mg
by Bulk
Higher-dose L-theanine capsules providing 250mg per serving — more than most competitors. With 120 capsules per tub at a budget price, this is one of the most cost-effective L-theanine options in the UK. Particularly popular among nootropic enthusiasts who stack it with caffeine for enhanced focus. A no-frills formulation from the UK's largest online sports supplement retailer.
AI Review Summary
Bulk's L-Theanine is the budget king of the UK theanine market, offering the highest dose and lowest price per serving. The 250mg dose exceeds the standard 200mg used in most studies, which may benefit those who find lower doses insufficient. The main trade-off is the lack of a patented source — there's no guarantee of L-isomer purity like Suntheanine offers. For budget-conscious users willing to accept this, the value is unbeatable.
Pros
- +Cheapest L-theanine per serving in the UK
- +250mg per capsule — highest dose among competitors
- +120 capsules for four months' supply
- +UK manufactured
Cons
- -No patented source — L-isomer purity not verified
- -Microcrystalline cellulose filler
- -Only GMP certification — fewer quality assurances
Best For
Watch Out
- !No patented source means potential quality variation
- !250mg may cause mild drowsiness in sensitive individuals
Ingredients & Composition
Active Ingredients
- L-Theanine
- 250mg
Other Ingredients
Bulking Agent (Microcrystalline Cellulose), Capsule Shell (Hypromellose), Anti-Caking Agent (Magnesium Stearate)
Clean Label Analysis
Standard budget formulation with microcrystalline cellulose filler. Unlike NOW Foods, Bulk does not use a patented theanine source, so L-isomer purity is not independently verified.
Quality & Testing
Third-Party Tested
This product has been independently tested by third-party laboratories for purity, potency, and safety.
Certifications
Additional Specifications
- Type
- Amino Acid
- Form
- Capsules
- Dose
- 250mg L-theanine
- Serving Size
- 1 capsule
- Fillers Analysis
- Standard budget formulation with microcrystalline cellulose filler. Unlike NOW Foods, Bulk does not use a patented theanine source, so L-isomer purity is not independently verified.
- Allergens
- Free from: gluten, dairy, soy, eggs, nuts
- Made In
- UK
How We Score Supplements
Our AI analyses reviews from Reddit, Amazon, YouTube, and specialist forums, then scores each product on a 1-10 scale across six evidence-based categories:
Effectiveness
How well the product delivers its claimed benefits, based on aggregated user experiences.
Ingredient Quality
Bioavailable forms, clean label, minimal fillers, no artificial junk. Higher = cleaner.
Value for Money
Price per serving relative to ingredient quality and effectiveness.
Side Effects Profile
Higher score = fewer side effects. 10 means virtually no adverse reactions reported.
Certifications & Testing
Third-party lab testing, GMP certification, and independent quality verification.
Overall Score
Weighted combination of all factors. Our bottom-line recommendation.
Disclaimer: AIScored provides AI-generated summaries based on publicly available reviews and product information. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Affiliate links may earn us a commission at no extra cost to you.