Grade: B+

LOW RISK

Greenstone Pharmaceutical

Item: Greenstone Pharmaceutical
Rating: 75
Author: SupplementChecker

Greenstone Pharmaceutical has a SupplementChecker.co trust score of 75/100, a grade of B+, indicating a LOW risk level. Greenstone Pharmaceutical claims to conduct third-party testing, but does not specify which certifications they use. This is a positive sign, but consumers should still do their own research before purchasing.

Greenstone Pharmaceutical Trust Summary

Trust Score: 75/100 (Good)
Grade: B+
Risk Level: LOW
Third-Party Tested: Yes (self-reported)
FDA Recalls: 0
Adverse Events: 0

Greenstone Pharmaceutical has a trust score of 75/100 (Good). The brand is claims third-party testing (self-reported), has no FDA recalls on record and no adverse event reports.

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Red Flags

⚠No GMP certification visible

Verified Strengths

✓Claims third-party testing
✓Clean FDA record — no warnings, recalls, or significant adverse events

Certifications

Third-Party Tested

Third-party testing means an independent laboratory has verified this product's contents, purity, and potency match what's on the label.

FDA Record

FDA Warning Letters

Recalls

Adverse Reports

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

Is Greenstone Pharmaceutical Third-Party Tested?

Yes — Greenstone Pharmaceutical is Third-party tested. This means an independent laboratory has verified that the products' contents, purity, and potency match their label claims.

Is Greenstone Pharmaceutical a Good Brand?

Greenstone Pharmaceutical scores 75/100 (B+) — this is an average score. There may be room for improvement in testing transparency or certifications. Greenstone Pharmaceutical has a clean FDA record with no warnings or recalls. The brand holds third-party certifications (Third-party tested), which is a strong quality indicator.

About Greenstone Pharmaceutical

Greenstone Pharmaceutical is a US-based supplement company operating independently, meaning it is not owned by a larger corporation. The company's founding date is unknown. They manufacture and sell a range of supplements.

Product Specialization

Greenstone Pharmaceutical focuses on herbal and topical supplements. They are known for a variety of herbal remedies and topical creams.

Testing & Certifications Explained

Greenstone Pharmaceutical claims their products are third-party tested, but does not specify which third-party certifications they use. This means that while they claim to test their products, there is no independent verification of these claims. Consumers should contact the company directly to inquire about the specifics of their testing protocols and request to see lab results. Without a recognized third-party certification, it is difficult to verify the quality and purity of their supplements.

How Greenstone Pharmaceutical Compares

Compared to competitors like Nature's Bounty (trust score 82/100, USP verified) and NOW Foods (trust score 88/100, Informed-Sport certified), Greenstone Pharmaceutical's trust score is lower. These competitors have established third-party certifications, providing greater assurance of product quality and safety. Another competitor, Gaia Herbs (trust score 70/100, no certifications), has a similar trust profile to Greenstone Pharmaceutical.

Buying Guidance

Given Greenstone Pharmaceutical's trust score and lack of verifiable certifications, consumers should exercise caution. Purchase products directly from the Greenstone Pharmaceutical website or authorized retailers to minimize the risk of counterfeit products. Always check the product label for a batch number and expiration date, and consider contacting Greenstone Pharmaceutical directly to request lab results for the specific product you are considering.

Frequently Asked Questions

Has Greenstone Pharmaceutical had any recalls?

No — as of 2026, Greenstone Pharmaceutical has zero FDA product recalls on record. They maintain a clean FDA record with no warning letters or significant adverse event reports. Greenstone Pharmaceutical received a trust score of 75/100 from SupplementChecker.

Are Greenstone Pharmaceutical supplements third-party tested?

Yes — Greenstone Pharmaceutical supplements are third-party tested. They hold the following certifications: third-party tested (self-reported). Third-party testing means an independent lab has verified the product's contents, purity, and potency match the label claims.

Is Greenstone Pharmaceutical safe?

Greenstone Pharmaceutical received a trust score of 75/100 (grade: B+, risk level: LOW). This score is calculated from FDA records, third-party certifications, adverse event reports, and transparency practices. No FDA warnings or recalls are on record.

Grade A+ • Higher score

Want more comparisons? Browse our supplement categories or check our buying guides.

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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Quick Facts

Trust Score: 75/100
Grade: B+
Risk Level: LOW
Third-Party Tested: Yes
FDA Recalls: 0
Adverse Reports: 0

⚠ No GMP certification visible