Grade: B+

MEDIUM RISK

Isopure

Item: Isopure
Rating: 70
Author: SupplementChecker

Part of Glanbia

https://www.theisopurecompany.com Est. 1997 (29 years) Last reviewed: April 14, 2026

Isopure has a SupplementChecker.co trust score of 70/100, which is a grade of B+ and indicates MEDIUM risk. The brand is GMP Certified but there's no evidence that Isopure products are third-party tested. Consumers should consider this when evaluating if Isopure is a good brand for their needs.

Isopure Trust Summary

Trust Score: 70/100 (Good)
Grade: B+
Risk Level: MEDIUM
Third-Party Tested: No
FDA Recalls: 0
Adverse Events: 1
Years in Business: 29 years
GMP Certified: Yes

Isopure 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 1 adverse event report and has been in business for 29 years.

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Red Flags

⚠No third-party testing certifications found

Verified Strengths

✓Established brand — operating since 1997 (29 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

Is Isopure Third-Party Tested?

No — Isopure 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 Isopure a Good Brand?

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

About Isopure

Isopure is a sports nutrition brand founded in 1997 and owned by parent company Glanbia. The company is based in the US. Isopure is known for its range of protein supplements and is a well-established brand in the fitness and bodybuilding community.

Product Specialization

Isopure specializes in protein supplements. Their product line includes whey protein isolates, protein powders, and ready-to-drink protein beverages, often marketed towards athletes and fitness enthusiasts.

How Isopure Compares

Compared to brands like Optimum Nutrition (trust score 82/100, third-party tested) and Transparent Labs (trust score 95/100, third-party tested), Isopure's trust score is lower, primarily due to the lack of third-party testing. Myprotein, another competitor, has a similar trust score (72/100) and also lacks comprehensive third-party testing. This highlights the importance of considering independent verification when choosing a protein supplement.

Testing & Certifications Explained

Isopure is GMP Certified, which means they adhere to Good Manufacturing Practices. These practices ensure products are consistently produced and controlled according to quality standards. However, Isopure does not appear to have third-party testing certifications. This means that independent organizations are not verifying the contents and purity of their products. Consumers seeking third-party tested supplements may want to consider other options.

Buying Guidance

Isopure products are widely available online and in supplement stores. Given that it's unclear if Isopure is third-party tested, consumers should carefully review the ingredient list and nutritional information. Check Isopure reviews from multiple sources before purchasing.

Frequently Asked Questions

Has Isopure had any recalls?

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

Are Isopure supplements third-party tested?

No — Isopure 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 Isopure safe?

Isopure 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 Isopure a good brand?

Isopure 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.

See our full scoring methodology and data sources for how each signal is measured.

All data sourced from FDA.gov, Health Canada (LNHPD / recalls-rappels), NSF.org, USP.org, and publicly available brand information. Last updated: 5/1/2026.

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