Legion Peak Caffeine + L-Theanine supplement bottle
Legion

Peak Caffeine + L-Theanine Review

What We Researched
2 active ingredients analyzed · 7 inactive ingredients decoded · 5 brand certifications checked · Last updated: Aug 2026
100
Product Score Excellent
92
Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
PurCaf® Organic Caffeine (from Green Coffee Bean) 100.0 mg †
L-Theanine (Suntheanine®) 100.0 mg †
Bioavailability Excellent

Absorption Rating

  • PurCaf® Organic Caffeine (from Green Coffee Bean) Good
  • L-Theanine (Suntheanine®) Good
Other Ingredients Excellent

Fillers & Additives

  • Hypromellose
  • Sunflower Oil
  • Rice Extract
  • Bamboo Extract
  • Rice Hulls
  • Gum Arabic
  • Rice Flour
Efficacy Excellent

Dosage Analysis

  • PurCaf® Organic Caffeine (from Green Coffee Bean) 100.0 mg Effective
  • L-Theanine (Suntheanine®) 100.0 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
PurCaf® Organic Caffeine (from Green Coffee Bean) 100.0 mg †
L-Theanine (Suntheanine®) 100.0 mg †

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Hypromellose Safe

Forms vegetarian capsule shells. Dissolves easily in the stomach.

Sunflower Oil Safe

Helps dissolve and absorb fat-soluble vitamins.

Rice Extract Safe

It is used as a filler or to provide specific rice-derived compounds.

Bamboo Extract Generally_safe

It may be used as a source of silica or for its antioxidant properties.

Rice Hulls Generally_safe

It is used as a filler or flow agent.

Gum Arabic Safe

It is used as a thickener, binder, or emulsifier.

Rice Flour Safe

Natural bulking agent to fill capsule space. Hypoallergenic.

Brand Trust Report
Legion

Founded 2014 · Clearwater, FL, USA · 94 products · legionathletics.com/

Certifications

5 certifications
Labdoor Verified Source
Fda Gmp Inspections Verified Source
Non Gmo Project Verified Source
Nsf Gmp Verified Source
NSF Certified Verified

Transparency

4 claims
Third Party Testing Claim — Verified Source
Coa Availability — Verified Source
Testing Lab Disclosure — Verified Source

Violation History

4 incidents
Fda Warning Structure/function claims on a creatine product suggesting it is intended for use as a drug.2024-05-02Source
Lawsuit Pulse pre-workout drinks were alleged to contain approximately 85 calories per serving, contrary to the 10 calories stated on the label.2022Source
Fda Warning Unsubstantiated claims for Coronavirus prevention and treatment.2020-04-21Source
Prop 65 Lead2019-09-24Source
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Frequently Asked Questions
Is Legion Peak Caffeine + L-Theanine a good supplement?

Legion Peak Caffeine + L-Theanine received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 2 active ingredients with 60 servings per container. Of the 7 inactive ingredients, 5 are rated safe and 0 are flagged for review. The manufacturer, Legion, holds a brand trust score of 92/100 with 5 verified certifications including Labdoor, Fda Gmp Inspections, Non Gmo Project, Nsf Gmp.

What are the ingredients in Legion Peak Caffeine + L-Theanine?

Legion Peak Caffeine + L-Theanine contains 2 active ingredients: PurCaf® Organic Caffeine (from Green Coffee Bean) (100.0 mg), L-Theanine (Suntheanine®) (100.0 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Legion Peak Caffeine + L-Theanine safe to take?

Legion Peak Caffeine + L-Theanine has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Legion a trustworthy supplement brand?

Legion receives a brand trust score of 92/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2014 and headquartered in Clearwater, FL, USA, the company offers 94 products in their lineup. They hold 5 verified certifications including Labdoor, Fda Gmp Inspections, Non Gmo Project, Nsf Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Legion has 4 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records — read our methodology. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.