Grade: B+

MEDIUM RISK

Natural Stacks

Item: Natural Stacks
Rating: 70
Author: SupplementChecker

https://www.naturalstacks.com Est. 2013 (13 years)

Natural Stacks has a SupplementChecker.co trust score of 70/100, a grade of B+, indicating a MEDIUM risk level. Natural Stacks does not claim to conduct third-party testing on its products. While the brand is GMP Certified and has a clean FDA record, the absence of third-party testing is a consideration for consumers.

Natural Stacks Trust Summary

Trust Score: 70/100 (Good)
Grade: B+
Risk Level: MEDIUM
Third-Party Tested: No
FDA Recalls: 0
Adverse Events: 0
Years in Business: 13 years
GMP Certified: Yes

Natural Stacks has a trust score of 70/100 (Good). The brand is not third-party tested by NSF, USP, or Informed Sport, has no FDA recalls on record and no adverse event reports and has been in business for 13 years.

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Red Flags

⚠No third-party testing certifications found

Verified Strengths

✓Established brand — operating since 2013 (13 years)
✓Clean FDA record — no warnings, recalls, or significant adverse events

Certifications

GMP Certified

GMP certification ensures manufacturing quality standards are met, but does not verify that product contents match the label through independent testing. Look for NSF, USP, or Informed Sport certifications for third-party verified products.

FDA Record

FDA Warning Letters

Recalls

Adverse Reports

Clean record — no FDA warnings, recalls, or significant adverse events.

Is Natural Stacks Third-Party Tested?

No — Natural Stacks is not currently third-party tested by independent certifiers like NSF, USP, or Informed Sport. They do hold GMP certification, which ensures manufacturing quality but does not independently verify product contents. We recommend looking for brands with verified third-party testing for the highest confidence in product quality. See our guide to third-party tested supplements.

Is Natural Stacks a Good Brand?

Natural Stacks scores 70/100 (B+) — this is an average score. There may be room for improvement in testing transparency or certifications. Natural Stacks has a clean FDA record with no warnings or recalls. The brand does not currently hold third-party testing certifications.

About Natural Stacks

Natural Stacks is an independent supplement company founded in 2013. The company formulates and sells a range of supplements, primarily focused on cognitive enhancement and overall wellness. Natural Stacks aims to provide targeted nutritional support for various aspects of health.

Product Specialization

Natural Stacks specializes in nootropics, brain health supplements, and vitamins. Their product line includes formulations designed to support memory, focus, mood, and overall cognitive function. They offer a variety of products targeting different aspects of brain health and general wellness.

Testing & Certifications Explained

Natural Stacks is GMP Certified, indicating adherence to Good Manufacturing Practices. However, Natural Stacks does not claim that its products are tested by independent third-party laboratories. Third-party testing provides an extra layer of assurance regarding the accuracy of ingredient claims and the absence of contaminants. Consumers seeking third-party tested supplements may want to consider other brands.

How Natural Stacks Compares

Compared to competitors in the nootropics and brain health space, Natural Stacks' trust score of 70/100 places it in the mid-range. For example, a brand that is third-party tested might score higher. Consumers often compare Natural Stacks reviews to those of other brands to assess product effectiveness and safety.

Buying Guidance

Given Natural Stacks' trust score and lack of third-party testing claims, consumers should carefully consider their individual needs and preferences. Look for Natural Stacks reviews from multiple sources. While Natural Stacks has a clean FDA record, the absence of third-party testing means consumers should be diligent in researching the products before purchasing.

Frequently Asked Questions

Has Natural Stacks had any recalls?

No — as of 2026, Natural Stacks has zero FDA product recalls on record. They maintain a clean FDA record with no warning letters or significant adverse event reports. Natural Stacks received a trust score of 70/100 from SupplementChecker.

Are Natural Stacks supplements third-party tested?

No — Natural Stacks supplements are not currently third-party tested by independent certifiers like NSF, USP, or Informed Sport. They do have GMP (Good Manufacturing Practice) certification, which ensures manufacturing quality but does not independently verify product contents.

Is Natural Stacks safe?

Natural Stacks received a trust score of 70/100 (grade: B+, risk level: MEDIUM). This score is calculated from FDA records, third-party certifications, adverse event reports, and transparency practices. No FDA warnings or recalls are on record.

Is Natural Stacks a good brand?

Natural Stacks scores 70/100 (grade: B+) — this is an average score. There may be room for improvement in testing transparency or certifications. They do not currently hold third-party testing certifications like NSF, USP, or Informed Sport. No FDA warnings or recalls found.

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How We Calculated This Score

Every brand starts with a baseline score of 70/100.

Points added for: Third-party certifications (NSF +15, USP +15, Informed Sport +10), publishing lab results (+10), clean regulatory record (+10), 10+ years in business (+10), organic certification (+5).

Points deducted for: FDA warning letters (-25), product recalls (-20), high adverse events (-15), no third-party testing (-15), proprietary blends (-10), no GMP (-10).

Score is capped at 0-100. Grade and risk level are derived from the final score.

All data sourced from FDA.gov, Health Canada (LNHPD / recalls-rappels), NSF.org, USP.org, and publicly available brand information. Last updated: 4/9/2026.

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