Grade: D

HIGH RISK

Six Star

Item: Six Star
Rating: 40
Author: SupplementChecker

Last reviewed: April 14, 2026

Six Star has a SupplementChecker.co trust score of 50/100, which is a Grade C and indicates MEDIUM risk. Six Star does not appear to conduct third-party testing on its supplements. Consumers should carefully evaluate Six Star reviews and consider the lack of independent verification when making purchasing decisions.

Six Star Trust Summary

Trust Score: 40/100 (Below Average)
Grade: D
Risk Level: HIGH
Third-Party Tested: No
FDA Recalls: 0
Adverse Events: 12

Six Star has a trust score of 40/100 (Below Average). The brand is not third-party tested by NSF, USP, or Informed Sport, has no FDA recalls on record and 12 adverse event reports.

Where to Buy Six Star

Purchase from trusted retailers. We may earn a commission at no extra cost to you.

Buy on Amazon Buy on Herbspro Buy on iHerb

Check another brand:

e.g. Nature Made, Thorne, NOW Foods...

Check

Red Flags

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

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

Is Six Star Third-Party Tested?

No — Six Star 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 Six Star a Good Brand?

Six Star scores 40/100 (D) — this is a below-average score. We recommend considering brands with third-party certifications like NSF or USP. Six Star has a clean FDA record with no warnings or recalls. The brand does not currently hold third-party testing certifications.

About Six Star

Six Star is a US-based specialty supplement brand operating independently. The founding date is unknown. Six Star offers a range of supplements, primarily marketed towards athletes and fitness enthusiasts.

Product Specialization

Six Star specializes in sports nutrition supplements. Their product line includes protein powders, pre-workout formulas, creatine supplements, and post-workout recovery aids.

How Six Star Compares

Compared to competitors like Optimum Nutrition (trust score 75/100) and Klean Athlete (trust score 90/100), Six Star's trust score is considerably lower. Optimum Nutrition provides some third-party testing information, while Klean Athlete is known for its comprehensive certification program. Other brands like MuscleTech (trust score 60/100) have similar scores to Six Star, but may offer more transparency around manufacturing processes.

Testing & Certifications Explained

Six Star does not appear to have any third-party testing certifications. This means that independent organizations are not verifying the quality, purity, or potency of Six Star's products. Consumers must rely solely on the brand's own claims, without independent confirmation. This lack of certification impacts the 'is Six Star safe?' question.

Buying Guidance

Given Six Star's trust score and lack of third-party testing, consumers should exercise caution. Purchase Six Star products from reputable retailers to minimize the risk of counterfeit products. Always carefully review product labels and consider consulting with a healthcare professional before using any new supplement.

Frequently Asked Questions

Has Six Star had any recalls?

No — as of 2026, Six Star has zero FDA product recalls on record. Six Star received a trust score of 40/100 from SupplementChecker.

Are Six Star supplements third-party tested?

No — Six Star 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 Six Star safe?

Six Star received a trust score of 40/100 (grade: D, risk level: HIGH). 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 Six Star a good brand?

Six Star scores 40/100 (grade: D) — 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.

Get FDA Recall Alerts

We'll notify you when FDA recalls affect supplement brands you care about.

Compare Similar Brands

Brands in similar categories with comparable trust profiles. Compare certifications, scores, and safety records.

55/100

Lower rated

Persona Nutrition

Grade C • Higher score

55/100

Lower rated

Spectrum Essentials

Grade C • Higher score

55/100

Lower rated

Feel

Grade C • Higher score

55/100

Lower rated

Golde

Grade C • Higher score

55/100

NSF

Lower rated

EST

Grade C • 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.

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.

Promote Your Trust Score

Embed this badge on your site — it displays Six Star's verified trust score and links back to this profile page. Helps show buyers you're transparent about third-party testing.

Small · 220×110

<iframe src="https://supplementchecker.co/embed/six-star/" width="220" height="110" frameborder="0" loading="lazy" title="Six Star trust score by SupplementChecker"></iframe>

Medium · 320×160

<iframe src="https://supplementchecker.co/embed/six-star/" width="320" height="160" frameborder="0" loading="lazy" title="Six Star trust score by SupplementChecker"></iframe>

Large · 420×210

<iframe src="https://supplementchecker.co/embed/six-star/" width="420" height="210" frameborder="0" loading="lazy" title="Six Star trust score by SupplementChecker"></iframe>

Paste the snippet anywhere on your site. The badge updates automatically when Six Star's trust score changes.

Own this brand? Contact us to update your information.

Want to find supplements you can trust?

Third-party testing is the single best indicator of supplement quality. We analyzed Six Star and 500+ other brands to find the ones that actually prove what's on the label.

See the best third-party tested supplements →