Grade: C

MEDIUM RISK

Natural Factors BioSil

Item: Natural Factors BioSil
Rating: 50
Author: SupplementChecker

Natural Factors BioSil has a SupplementChecker.co trust score of 50/100, which translates to a grade of C and a MEDIUM risk level. Notably, we found no evidence of third-party testing certifications for Natural Factors BioSil. This is a key factor for consumers evaluating if Natural Factors BioSil is a good brand.

Natural Factors BioSil Trust Summary

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

Natural Factors BioSil 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 Natural Factors BioSil Third-Party Tested?

No — Natural Factors BioSil 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 Natural Factors BioSil a Good Brand?

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

About Natural Factors BioSil

Natural Factors BioSil is a supplement brand operating independently in the US. The founding date is unknown. They offer a range of products in the supplement market.

Product Specialization

Natural Factors BioSil specializes in specialty supplements. These products often target specific health concerns or needs, such as collagen production.

Testing & Certifications Explained

Natural Factors BioSil does not appear to have any visible third-party certifications. This means that no independent organization has verified the quality, purity, or potency of their products. For consumers, this lack of certification increases the risk of inconsistencies between the label and the actual product contents. Consumers seeking third-party tested supplements may want to consider other brands.

How Natural Factors BioSil Compares

Compared to other brands in the specialty supplement category, Natural Factors BioSil's trust score of 50/100 is lower than brands like Thorne Research (92/100) which has extensive third-party certifications. Another competitor, NOW Foods (85/100), also demonstrates a stronger commitment to third-party testing. This difference highlights the importance of considering certification status when evaluating supplement brands.

Buying Guidance

Given the lack of third-party testing certifications and a trust score of 50/100, consumers should exercise caution when purchasing Natural Factors BioSil products. Purchase from reputable retailers and carefully examine product labels. If possible, contact Natural Factors BioSil directly to inquire about their internal testing procedures.

Frequently Asked Questions

Has Natural Factors BioSil had any recalls?

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

Are Natural Factors BioSil supplements third-party tested?

No — Natural Factors BioSil 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 Natural Factors BioSil safe?

Natural Factors BioSil 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 Natural Factors BioSil a good brand?

Natural Factors BioSil 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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