Nature's Truth KSM-66 Ashwagandha Plus L-Theanine supplement bottle
Nature's Truth

KSM-66 Ashwagandha Plus L-Theanine Review

What We Researched
2 active ingredients analyzed · 6 inactive ingredients decoded · 5 brand certifications checked · Last updated: Aug 2026
100
Product Score Excellent
96
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
KSM-66 Ashwagandha® Extract (Withania somnifera) (root) 600 mg *
L-Theanine 200 mg *
Bioavailability Excellent

Absorption Rating

  • KSM-66 Ashwagandha® Extract (Withania somnifera) (root) Good
  • L-Theanine Good
Other Ingredients Excellent

Fillers & Additives

  • Cellulose (Plant Origin)
  • Croscarmellose
  • Vegetable Stearic Acid
  • Vegetable Magnesium Stearate
  • Silica
  • Cellulose Coating
Efficacy Excellent

Dosage Analysis

  • KSM-66 Ashwagandha® Extract (Withania somnifera) (root) 600 mg Effective
  • L-Theanine 200 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
KSM-66 Ashwagandha® Extract (Withania somnifera) (root) 600 mg *
L-Theanine 200 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose (Plant Origin) Safe

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

Croscarmellose Generally_safe

It is used as a binder and disintegrant to help tablets dissolve.

Vegetable Stearic Acid Generally_safe

It is used to prevent ingredients from sticking to manufacturing equipment.

Vegetable Magnesium Stearate Safe

Prevents ingredients from sticking to equipment. Derived from vegetable sources.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Cellulose Coating Generally_safe

It is used to coat tablets or capsules for easier swallowing or to control release.

Brand Trust Report
Nature's Truth

Founded 2014 · Bohemia, NY, United States · 233 products · naturestruth.com/

Certifications

5 certifications
Fda Gmp Inspections Verified Source
Nsf Gmp Verified Source
Usda Organic Verified Source
NSF Contents Certified Verified
Non-GMO Project Verified Verified

Transparency

5 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Claimed
In House Testing — Verified Source
Contains Proprietary Blend — True

Violation History

5 incidents
Lawsuit Misleading labeling regarding the amount of magnesium in 'CALM GUMMIES Magnesium Supplement'.2024Source
Prop 65 Lead2021-09-13Source
Recall Lavender Body Cream2021-06-17Source
Fda Warning Public health warning against the purchase and consumption of an unregistered food supplement (High Potency Selenium 200mcg).2020-03-05Source
Recall Wintergreen 100% Pure Essential Oil2019-07-03Source
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Frequently Asked Questions
Is Nature's Truth KSM-66 Ashwagandha Plus L-Theanine a good supplement?

Nature's Truth KSM-66 Ashwagandha Plus 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 30 servings per container. Of the 6 inactive ingredients, 3 are rated safe and 0 are flagged for review. The manufacturer, Nature's Truth, holds a brand trust score of 96/100 with 5 verified certifications including Fda Gmp Inspections, Nsf Gmp, Usda Organic, NSF Contents Certified.

What are the ingredients in Nature's Truth KSM-66 Ashwagandha Plus L-Theanine?

Nature's Truth KSM-66 Ashwagandha Plus L-Theanine contains 2 active ingredients: KSM-66 Ashwagandha® Extract (Withania somnifera) (root) (600 mg), L-Theanine (200 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Nature's Truth KSM-66 Ashwagandha Plus L-Theanine safe to take?

Nature's Truth KSM-66 Ashwagandha Plus 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 Nature's Truth a trustworthy supplement brand?

Nature's Truth receives a brand trust score of 96/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2014 and headquartered in Bohemia, NY, United States, the company offers 233 products in their lineup. They hold 5 verified certifications including Fda Gmp Inspections, Nsf Gmp, Usda Organic, NSF Contents Certified. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Nature's Truth has 5 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.