Eco, Natural, Plant-Based: Are You Paying More for Words on a Label?

A green label can make a product look environmentally friendly. It doesn't necessarily make it so.

Stand in front of a supermarket shelf and you could be forgiven for thinking that buying washing-up liquid now requires an environmental science qualification.

One bottle is natural. Another is plant-based. A third promises an eco formula. There are leaves, waterfalls, brown cardboard and reassuring shades of green.

Some of these products offer worthwhile improvements. Others leave us with a warm feeling and very little information. The challenge is to tell the difference—and decide whether a higher price buys a benefit that matters.

The answer begins with three questions: What exactly is being claimed? What evidence supports it? What does the product cost each time it does its job?

The Greenest-Looking Bottle May Have the Least to Tell You

Imagine two labels on a household cleaner:

“Kind to nature. Inspired by plants.”

“Bottle contains 80% post-consumer recycled plastic, excluding cap and trigger.”

The first sounds reassuring. The second gives you something specific to investigate. It identifies the component, the material and the exceptions. It still says nothing about the cleaner's overall environmental performance, but at least its boundaries are clear.

That distinction matters. A packaging improvement can be useful without proving that everything inside the packaging is better too.

The UK's Competition and Markets Authority sets out six principles in its Green Claims Code: environmental claims should be accurate, clear, supported by evidence, omit no important information, use fair comparisons and consider the product's life cycle. Broad claims need evidence broad enough to support them. [1]

As a chemistry teacher, I find the scientific habit useful here: identify the claim before deciding whether the evidence answers it. A leaf on a bottle is a design choice. It is not a test result.

What Do Those Reassuring Words Actually Tell Us?

These terms can describe real features. None, by itself, answers every environmental question.

Wording	What to investigate
Eco / green / environmentally friendly	Which impact is lower, compared with what, and across which stages of the product's life?
Natural	How does the manufacturer define it? Which ingredients qualify, and what does that demonstrate about performance or impact?
Plant-based	Which ingredients come from plants, and what proportion of the formula do they represent? How were they grown and processed?
Biodegradable	Which component breaks down, under what conditions, how far and over what period?
Recyclable	Which parts can be recycled, and are they accepted by the collection service you actually use?
Recycled packaging	What percentage is recycled material? Does the claim include the closure, pump or trigger?
Refill / concentrate	How much packaging and product are needed for the same number of successful uses?

The Cleaning & Hygiene Suppliers Association has published a glossary addressing terms including natural, chemical-free and biodegradability, and advises buyers to ask for supporting evidence. The need for clearer language is recognised within the cleaning industry itself. [2]

Natural Is an Origin Description, Not a Safety Test

A substance's properties depend on what it is, how much is present and how we are exposed to it. Being obtained from a plant does not automatically make an ingredient harmless. Being manufactured does not automatically make it harmful.

Nor does “plant-based” mean unprocessed. Plant-derived raw materials can undergo substantial chemical processing before becoming useful cleaning ingredients.

For toiletries, judge suitability separately from environmental branding. A botanical fragrance may be attractive, but it does not establish that a product suits sensitive skin. Check the ingredients and warnings relevant to your needs.

And “chemical-free”? Water is a chemical substance. So are the ingredients responsible for cleaning. More useful information identifies the particular ingredient excluded and explains why its absence matters.

Biodegradable Does Not Mean “Disappears Harmlessly Anywhere”

There is an important difference between dissolving and biodegrading.

Sugar dissolves in tea: it has dispersed through the liquid, rather than ceased to exist. Similarly, watching a film or tablet disappear from view does not establish what happens to its constituent substances afterwards.

An environmental claim needs conditions and evidence, not just a convincing demonstration.

In April 2025, the Advertising Standards Authority upheld complaints about several OceanSaver advertising claims, including claims concerning plastic, biodegradability and marine harm. For biodegradability, the ASA found that the evidence did not adequately demonstrate the advertised laundry pods would fully biodegrade through normal use. That finding concerned the specific advertising and evidence assessed; it should not be turned into a verdict on every dissolvable film or on the brand's current range. [3]

For shoppers, the useful question is: does the evidence concern this product under relevant conditions, or merely a related material in a different test?

Independent Certification: Check What It Covers

A recognised scheme can reduce the detective work. However, a certification mark answers questions within its scope.

Scheme or approval	What it helps you assess	What it does not establish by itself
EU Ecolabel	Independently checked, category-specific environmental criteria, using a life-cycle approach. Cleaning product criteria address matters including hazardous substances, packaging and fitness for use.	Zero environmental impact, or suitability for every task and user.
FSC labels	Sourcing of forest-based materials in paper products or packaging. FSC 100%, Mix and Recycled have different meanings.	The environmental performance of a detergent inside an FSC-labelled carton.
Cruelty Free International approval	Compliance with the organisation's criteria concerning animal testing. Its branding is transitioning from its Leaping Bunny mark.	A complete assessment of carbon emissions, packaging, biodegradability or resource use.

Sources: European Commission, FSC UK and Cruelty Free International. [4–7]

Check the scheme's own website for the relevant product, licence or approved brand, as applicable. Read the criteria rather than relying on the appearance of a logo. A company's own green emblem may simply represent its own claim.

Equally, the absence of a particular certificate does not prove that a product performs badly environmentally. Specific, credible evidence remains useful. Independent checking adds assurance; it does not replace understanding the claim.

Compare the Cost of the Job, Not the Bottle

A £6 bottle can be cheaper to use than a £3 bottle. It depends on concentration, dosing and results.

Cost per use = purchase price ÷ number of effective uses.

Consider this illustrative laundry comparison. These are invented figures for explaining the calculation, not current shop prices or tested products.

Product	Price	Bottle size	Recommended dose for the same washing conditions	Calculated washes	Detergent cost per wash
Standard liquid	£4.00	1,000 ml	50 ml	20	20p
Concentrated liquid	£6.00	900 ml	30 ml	30	20p
Premium liquid with an eco claim	£7.50	750 ml	50 ml	15	50p

The concentrate costs more at the till but the same per wash as the standard product. The premium example costs 30p more per wash. At five washes a week, that difference is £78 a year.

That premium may buy independently evidenced benefits you value. The calculation does not decide that question; it tells you what you are paying for the choice.

Make the comparison fair: use the dose for your water hardness, load size and level of soiling. A headline wash count based on different conditions can mislead your household budget.

If you pour 60 ml of the concentrate instead of its recommended 30 ml, the example bottle lasts 15 washes and costs 40p per wash. The promised economy depends partly on measuring what you use.

Performance Belongs in the Calculation

The relevant unit is a successfully cleaned load, surface or batch of dishes.

If a product requires a second attempt, include the additional product—and any extra water, energy and time—in your comparison. Likewise, good performance at a suitable lower washing temperature may be useful, but follow garment, appliance and hygiene guidance.

Environmental claims and cleaning effectiveness are separate questions. Ask both.

Four Places to Try This at Home

1. Cleaning Sprays: Count the Refills

Suppose a ready-to-use 500 ml spray costs £2.50. A £1.50 refill makes the same volume at the instructed dilution. If both do the same job, the refill reduces product cost by £1 per bottle prepared.

Include the reusable bottle's initial cost when starting a new system. For the environmental comparison, check the refill packaging, delivery and number of bottle reuses. “Refill” describes a system; the savings depend on how it works.

2. Detergents: Measure the Dose

Read the dosing instructions before trusting a pack's wash count. Use the measuring cap or dispenser correctly, and keep the comparison consistent with your water hardness and load.

My first experiment would be to measure the recommended dose beside the amount I would otherwise pour. It is a simple way to discover whether the label's assumptions match my habits.

3. Toiletries: Count Useful Washes

A £5 shampoo bar lasting 50 satisfactory washes costs 10p per wash. A £3 bottle lasting 20 costs 15p per wash. Those are hypothetical counts: hair length, amount used, storage and suitability will change the result.

Let the bar dry between uses as instructed. Include any conditioner or additional product needed to get a comparable result. A solid format may reduce bottle use, but that feature alone does not establish a lower total footprint.

4. Household Consumables: Find the Right Unit

For toilet tissue, compare price per 100 sheets, then consider sheet size, ply and how much you use. Roll price alone can conceal very different quantities.

For bin liners, compare price per bag of suitable capacity and strength. A cheaper bag becomes less economical if it routinely needs double-bagging. Check recycled-content claims separately from strength and fitness for use.

Your Three-Product Cupboard Challenge

Choose a cleaner, a detergent and a toiletry or household consumable you already own. There is no need to buy anything for this exercise.

For each one:

1. Copy one environmental claim exactly. Distinguish the words on the pack from the impression created by its colours and pictures.
2. Identify its scope. Formula, ingredient, packaging, factory, delivery or whole product?
3. Look for evidence. Follow the label's link or search the manufacturer's website. Seek a relevant test, clear calculation or verifiable certification.
4. Check the boundaries. What is excluded? What comparison or disposal conditions does it depend on?
5. Calculate cost per useful use. Start with the recommended dose, then record how long it actually lasts.

Use this small record:

Product	Exact claim	Evidence and scope	Cost per useful use	Next purchase decision
Cleaner
Detergent
Toiletry or consumable

If a website provides only more reassuring slogans, record “evidence not found”. That is a fair account of your search, rather than proof that the claim is false.

You could ask the manufacturer: “What evidence supports this claim for this product, and does it apply to the formula, packaging or both?”

Keep products in their labelled containers and follow dosing, storage and disposal instructions. Never mix cleaning products or improvise stronger solutions. This is a label investigation, not a chemical experiment.

Pay for an Improvement You Can Explain

What appeals to me about this exercise is that it begins with curiosity. It does not require an expensive replacement shopping list.

We can support manufacturers making worthwhile improvements while asking them to describe those improvements clearly. We can also accept that a product has trade-offs: less packaging, perhaps, but a higher cost; a useful sourcing certificate, but no evidence about another impact.

Use up suitable products you already have, following their instructions, and let what you learn guide the next purchase.

This week, investigate three claims in your cupboard. By the end, aim to explain what each claim means, what supports it and what the product costs to use.

If you choose to pay more, you will know what benefit you are paying for. And if the only difference you can find is a leaf on the label, you have a good reason to keep asking questions.