LCA Is Powerful, But It Is Not a Magic Permission Slip
Life-cycle assessment is the best tool we have for product footprints — and the most misused number in green marketing.
A life-cycle assessment is the most rigorous way we have to understand a product's environmental footprint. It is also, routinely, the most over-interpreted document in a marketing folder. Both things are true, and the difference is worth understanding before a number reaches a label.
What LCA does well
An LCA built to the ISO framework (ISO 14040 for principles, ISO 14067 for product carbon footprints) or the GHG Protocol Product Standard gives you a structured, repeatable method: define the product system, count the flows, characterize the impacts. Done honestly, it is excellent for design decisions (where is the impact concentrated?), internal comparison (did the redesign help?), and supplier conversations (whose input dominates?).
The four quiet choices
Every LCA result is shaped by decisions made before any data is collected. System boundary: cradle-to-gate and cradle-to-grave can differ dramatically for the same product. Functional unit: per bottle, per litre, or per serving changes rankings. Allocation: how shared burdens split across co-products is a judgment call with rules, not a fact. Data quality: most studies mix a few measured values with many database averages — and the databases carry their own assumptions, ages, and geographies. None of this is scandal; it is method. But a marketing claim that hides these choices is presenting a judgment as a measurement.
Where it goes wrong
The failure pattern is nearly always the same: a single point number ("37% lower!") escapes its boundary, its functional unit, and its uncertainty range, and becomes a public comparative claim. Comparative claims are exactly where the rules bite hardest — a like-for-like baseline, the same functional unit on both sides, and evidence a skeptic can follow. It is also worth separating the roles: ISO and the GHG Protocol are standards bodies that define method; verifiers and certifiers are separate organizations that check specific studies; public databases supply background factors; and any private model in between should say what it assumed.
Before the number goes public
Ask four questions. Does the boundary of the claim match the boundary of the study? Is the functional unit the one a shopper would assume? Would the ranking survive the uncertainty range? And can an outsider trace the claim to the exact part of the product it describes? If any answer is no, the LCA is telling you something useful — just not the thing the label wants to say.
An LCA is evidence, not permission. The boundary, functional unit, allocation, and data quality shape every result — a claim is ready only when it matches what the study actually measured, uncertainty included.
What this means for brands
- Never let a comparative percentage leave the building without its baseline, boundary, and functional unit attached.
- Ask your LCA provider which values were measured and which came from database averages — the answer changes what you can claim.
- A cradle-to-gate study cannot support a whole-lifecycle claim like 'carbon neutral'.
- Treat the LCA as a map of where to improve first, then market the improvement — not the map.
Founder’s Vision
Evisentra's ideal LCA future is not a single black-box score. It is a transparent evidence trail: public emission factors wherever possible, private evidence clearly marked as private, uncertainty disclosed rather than rounded away, and every marketing claim tied back to the exact part of the product — and the exact lifecycle stage — it can support.
Sources & references
- ISO 14040 — Life cycle assessment: principles and framework
- ISO 14067 — Carbon footprint of products
- GHG Protocol Product Life Cycle Accounting and Reporting Standard
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Not legal advice. Decision-support only. Evisentra reviews claim readiness; it does not certify products or provide legal opinions. ← All Insights