Youtheory Relax Instant-Mix Natural Berry Flavor supplement bottle
Youtheory

Relax Instant-Mix Natural Berry Flavor Review

What We Researched
3 active ingredients analyzed · 4 inactive ingredients decoded · 4 brand certifications checked · Last updated: Aug 2026
91
Product Score Excellent
89
Brand Score Good

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
Magnesium (as Magnesium Citrate) 300 mg 71%
GABA 100 mg
L-Theanine 100 mg
Bioavailability Good

Absorption Rating

  • Magnesium (as Magnesium Citrate) Good
  • GABA Poor
  • L-Theanine Good
Other Ingredients Excellent

Fillers & Additives

  • L-Glycine
  • Xylitol
  • Natural Raspberry Flavor
  • Stevia Leaf Extract
Efficacy Excellent

Dosage Analysis

  • Magnesium (as Magnesium Citrate) 300 mg Effective
  • GABA 100 mg Effective
  • L-Theanine 100 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Magnesium (as Magnesium Citrate) 300 mg 71%
GABA 100 mg
L-Theanine 100 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

L-Glycine Unknown
Xylitol Safe

Provides sweetness with reduced calorie content. Does not promote tooth decay.

Natural Raspberry Flavor Generally_safe

It is used to enhance the taste of the supplement.

Stevia Leaf Extract Safe

Provides sweetness without calories or blood sugar impact.

Brand Trust Report
Youtheory

Founded 2010 · Irvine, California, United States · 137 products · youtheory.com/

Certifications

4 certifications
Consumerlab Verified Source
Usp Verified Verified Source
Nsf Gmp Verified Source
Non-GMO Project Verified Verified

Transparency

3 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source

Violation History

2 incidents
Prop 65 Lead2017-02-24Source
Lawsuit Investigation into potentially fraudulent anti-aging claims for Youtheory Collagen Tablets.2014
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Frequently Asked Questions
Is Youtheory Relax Instant-Mix Natural Berry Flavor a good supplement?

Youtheory Relax Instant-Mix Natural Berry Flavor received a product quality score of 91/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 3 active ingredients with 15 servings per container. Of the 4 inactive ingredients, 2 are rated safe and 0 are flagged for review. The manufacturer, Youtheory, holds a brand trust score of 89/100 with 4 verified certifications including Consumerlab, Usp Verified, Nsf Gmp, Non-GMO Project Verified.

What are the ingredients in Youtheory Relax Instant-Mix Natural Berry Flavor?

Youtheory Relax Instant-Mix Natural Berry Flavor contains 3 active ingredients: Magnesium (as Magnesium Citrate) (300 mg), GABA (100 mg), L-Theanine (100 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Youtheory Relax Instant-Mix Natural Berry Flavor safe to take?

Youtheory Relax Instant-Mix Natural Berry Flavor 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 Youtheory a trustworthy supplement brand?

Youtheory receives a brand trust score of 89/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2010 and headquartered in Irvine, California, United States, the company offers 137 products in their lineup. They hold 4 verified certifications including Consumerlab, Usp Verified, Nsf Gmp, Non-GMO Project Verified. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Youtheory has 2 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.