Grade: C

MEDIUM RISK

4DN

Item: 4DN
Rating: 50
Author: SupplementChecker

4DN has a SupplementChecker.co trust score of 50/100, which translates to a grade of C and a MEDIUM risk level. 4DN does not appear to conduct third-party testing on its products. Consumers wondering "is 4DN a good brand" should consider these factors when making a purchasing decision.

4DN Trust Summary

Trust Score: 50/100 (Fair)
Grade: C
Risk Level: MEDIUM
Third-Party Tested: No
FDA Recalls: 0
Adverse Events: 0

4DN has a trust score of 50/100 (Fair). The brand is not third-party tested by NSF, USP, or Informed Sport, has no FDA recalls on record and no adverse event reports.

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Red Flags

⚠No third-party testing certifications found
⚠No GMP certification visible

Verified Strengths

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

Certifications

No certifications on record. This brand has not demonstrated GMP compliance or third-party testing verification.

FDA Record

FDA Warning Letters

Recalls

Adverse Reports

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

Is 4DN Third-Party Tested?

No — 4DN is not currently third-party tested by independent certifiers like NSF, USP, or Informed Sport. No GMP certification was found on record either. 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 4DN a Good Brand?

4DN scores 50/100 (C) — this is a below-average score. We recommend considering brands with third-party certifications like NSF or USP. 4DN has a clean FDA record with no warnings or recalls. The brand does not currently hold third-party testing certifications.

About 4DN

4DN is a supplement brand operating independently in the US. The founding date of 4DN is unknown. They develop and market supplements to consumers.

Product Specialization

4DN specializes in protein supplements. They offer various protein powders and related products.

Testing & Certifications Explained

4DN does not have any visible third-party certifications. This means that no independent organization has verified the quality, purity, or potency of 4DN's products. Consumers should be aware that the absence of certifications reduces the level of independent assurance regarding product claims.

How 4DN Compares

Many brands in the protein supplement category, such as Optimum Nutrition (trust score 75/100) and Transparent Labs (trust score 88/100), pursue third-party testing and certifications to demonstrate product quality. Other competitors include Myprotein (trust score 62/100). 4DN's lack of certifications puts them at a disadvantage compared to brands that actively invest in independent verification.

Buying Guidance

Consumers should carefully evaluate 4DN's products and consider their risk tolerance given the lack of third-party testing. Purchase directly from 4DN or authorized retailers to minimize the risk of counterfeit products. Check "4DN reviews" from multiple sources before buying.

Frequently Asked Questions

Has 4DN had any recalls?

No — as of 2026, 4DN has zero FDA product recalls on record. They maintain a clean FDA record with no warning letters or significant adverse event reports. 4DN received a trust score of 50/100 from SupplementChecker.

Are 4DN supplements third-party tested?

No — 4DN supplements are not currently third-party tested by independent certifiers like NSF, USP, or Informed Sport. No independent testing or GMP certification was found on record.

Is 4DN safe?

4DN received a trust score of 50/100 (grade: C, 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 4DN a good brand?

4DN scores 50/100 (grade: C) — this is below average. We recommend looking for brands with third-party certifications like NSF or USP. 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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