COSMOS certification is the thing most "clean beauty" marketing gestures at without ever explaining, so here's what it actually requires: a product must meet specific, auditable rules for organic content, banned ingredients, manufacturing, and packaging before a certifying body like ECOCERT will put its name on the label.
COSMOS (Cosmetic Organic and Natural Standard) is the standard itself. ECOCERT is one of the third-party bodies that audits products against it and issues the certification. This guide covers what the standard checks, what it excludes, and how its two tiers differ — details usually left out of "clean beauty" copy.
Key Takeaways
- COSMOS is a standard; ECOCERT is one of the bodies that certifies products against it via third-party audit.
- COSMOS Organic requires 95%+ organic plant-based ingredients and 20%+ organic total formula (10% for rinse-off products).
- COSMOS excludes petrochemicals, parabens, phenoxyethanol, synthetic fragrances, synthetic colorants, and GMOs across both tiers.
- COSMOS Natural follows the same excluded-ingredient rules but has different, lower organic-content thresholds.
- Certified manufacturing must also meet eco-friendly processing and recyclable packaging requirements.
What COSMOS Certification Actually Requires
Under the COSMOS Organic tier, at least 95% of a product's plant-based (botanical) ingredients must be organically grown, and at least 20% of the total formula must be organic overall. That threshold drops to 10% for rinse-off products such as cleansers, since water — not counted as an organic ingredient — makes up a larger share of the formula. These aren't self-reported figures: a certifying body such as ECOCERT audits the formula and supply chain before granting COSMOS certification. Full requirements are on ECOCERT's COSMOS certification page. For how EU cosmetic regulation differs from the US baseline, see our guide to EU cosmetic safety standards.
What's Excluded
Regardless of tier, COSMOS certification rules out an entire list of ingredient categories: petrochemicals, parabens, phenoxyethanol, synthetic fragrances, synthetic colorants, and GMOs. A formula containing any of these cannot carry the COSMOS label. Certified products must also come from eco-friendly manufacturing and use recyclable packaging, so the standard covers how a product is made, not just its ingredient list. This exclusion list is part of why the minimalist approach common in European skincare exists, a philosophy covered in our piece on European minimalist formulation.
COSMOS Natural vs. COSMOS Organic
COSMOS certification actually covers two tiers, not one. COSMOS Organic is the stricter tier, with the 95%/20% (or 10% rinse-off) organic-content thresholds above. COSMOS Natural sits alongside it: same excluded-ingredient rules, but different, lower thresholds for how much of the formula must be organic. It's a real, distinct certification level, not a watered-down claim. Our GentleRenew line holds COSMOS Natural certification, meaning it was independently audited against that tier's criteria rather than labeled "clean" in-house. For more on what each certification means, see our Product Guides hub.
COSMOS Certification FAQ
What does COSMOS certification actually require?
An organic-content threshold (95% of plant-based ingredients and 20% of the total formula, or 10% for rinse-off products, for the Organic tier), a ban on petrochemicals, parabens, phenoxyethanol, synthetic fragrances, synthetic colorants, and GMOs, plus eco-friendly manufacturing and recyclable packaging. A body such as ECOCERT audits the product against these criteria before certifying it.
What's the difference between COSMOS Organic and COSMOS Natural?
Both tiers exclude the same synthetic ingredient categories. COSMOS Organic adds specific organic-content thresholds (95% of botanical ingredients, 20% of the total formula, 10% for rinse-off products). COSMOS Natural follows the same excluded-ingredient rules but applies different, lower organic-content thresholds — a distinct, independently audited certification level, not a lesser version of the same claim.
Is ECOCERT the same as COSMOS?
No. COSMOS is the standard — the published set of rules a product's formula, manufacturing, and packaging must meet. ECOCERT is one of the organizations authorized to audit products against that standard and issue COSMOS certification; it's the certifying body, not the standard itself.