NSF Certified
Bronze tier — Testing — accuracy, not sustainabilityTests that the ingredients listed match what is actually in the product, and screens for common contaminants. Useful but does not evaluate farming, environmental impact, or full sustainability.
- NSF International was founded in 1944 and develops public-health standards (NSF/ANSI).
- Certification tests that listed ingredients match actual contents and screens for common contaminants.
- Certification is maintained with annual testing and facility audits.
- Scope: ingredient safety and label accuracy — not farming practices or environmental impact.
What does NSF Certified require?
NSF certification answers a trust question: is what is printed on the label actually in the product, at the stated amounts, without contaminants? Products are tested against the relevant NSF/ANSI standard, and the manufacturing facility is audited. On supplements and personal care — categories with a long history of labels that do not match contents — that is genuinely useful.
Who audits it, and how often?
NSF International runs its own accredited labs, with annual retesting and facility audits to keep certification active. It is real third-party verification with a real standard behind it.
What does NSF Certified not cover?
Almost everything this site scores. NSF says nothing about how ingredients were farmed, what the carbon footprint is, how workers were treated, or whether the packaging will outlive us all. It verifies accuracy, not sustainability — a Bronze-tier fact worth knowing, not a green light.
How does GreenSpecs weight NSF Certified?
GreenSpecs weights NSF as Bronze: it earns a few points on the certifications signal for honest-label verification, and no more. A product leaning on NSF as its only credential is telling you its sustainability story is thin — the other four signals will say the rest.
Scan a product that carries this cert and see how it lands in the full five-signal score.