Why “Bioplastic” and “Biobased” Are Not the Same Thing

Walk through the packaging aisle of a sustainability-conscious grocery store and you’ll see labels like “made from bioplastic,” “biobased materials,” “plant-derived plastic,” “bio-PE,” “bio-derived polymer.” Most shoppers — and a fair number of buyers in the foodservice industry — assume these terms are interchangeable. They aren’t. They describe different things, and the differences matter for whether the product actually composts, whether it counts toward sustainability metrics, and whether the marketing claims hold up under scrutiny.

This article unpacks the bioplastic vs biobased terminology, explains why both labels can technically be accurate while describing materials that behave very differently in disposal, and gives a practical framework for evaluating what these labels mean on actual product packaging.

The core distinction

The shortest version:

“Biobased” describes what the material is made FROM — specifically, that the carbon in the material comes (at least partially) from biological sources like plants, rather than from petroleum.

“Bioplastic” describes a category of materials that can be either biobased, biodegradable, or both — depending on how the term is used. It’s a marketing category, not a technical specification.

These overlap, but they’re not the same. A material can be:

• Biobased AND biodegradable (e.g., PLA from corn that composts industrially)
• Biobased but NOT biodegradable (e.g., bio-PE from sugarcane that’s chemically identical to petroleum-PE and doesn’t compost)
• NOT biobased but biodegradable (e.g., PBAT made from petroleum that composts industrially)
• NOT biobased and NOT biodegradable (e.g., conventional petroleum plastic)

All four can show up in products labeled “bioplastic” depending on the definition the labeler uses. This is the crux of the confusion.

What “biobased” actually means

The USDA BioPreferred program defines “biobased” content as the percentage of carbon in a product that’s derived from renewable biological sources rather than from petroleum. It’s measured via radiocarbon (carbon-14) testing — biological carbon contains C-14, fossil carbon doesn’t.

A product can be:

• 100% biobased: All the carbon is from biological sources
• Partially biobased: Some percentage (usually labeled, e.g., “60% biobased”)
• 0% biobased: All carbon is from petroleum

Biobased content is purely about feedstock. It says nothing about the product’s behavior at end-of-life. A 100% biobased product might not biodegrade at all (it might be chemically identical to petroleum plastic and last just as long in landfill). A 0% biobased product might biodegrade quickly (petroleum-derived but designed to break down).

The biobased label is most useful for evaluating supply chain and lifecycle carbon footprint. Biobased materials generally have lower upstream carbon emissions because their carbon was recently in the atmosphere (absorbed by plants) rather than locked underground for millions of years.

What “bioplastic” actually means

This is where it gets fuzzy. The term “bioplastic” is used three different ways in the industry:

Definition 1 (industry-strict): Bioplastic = material that is either biobased OR biodegradable OR both. Under this definition, all four quadrants of the matrix above qualify if they meet at least one criterion.

Definition 2 (consumer-marketing): Bioplastic = plant-derived plastic. Implies biobased but is silent on biodegradability. Under this definition, bio-PE from sugarcane is a bioplastic (plant-derived) even though it doesn’t compost.

Definition 3 (sustainability-narrow): Bioplastic = biobased AND biodegradable. Under this definition, only materials like PLA, PHA, starch blends, and certain biodegradable polyesters from biological sources qualify.

The same product can be “bioplastic” under definitions 1 and 2 but not under definition 3. Marketing claims often use definitions 1 or 2 (more permissive); environmentally-aware consumers usually mean definition 3.

This is why the bioplastic label alone isn’t enough to tell you what a product is or what to do with it.

Common materials and how they fit

Looking at specific materials makes the distinctions concrete:

PLA (polylactic acid):
– Biobased: Yes, from corn or sugarcane
– Biodegradable: Yes, in industrial composting facilities (60-90 days under ASTM D6400)
– Backyard compostable: Generally no, requires industrial conditions
– Bioplastic by all definitions

PHA/PHB (polyhydroxyalkanoates/polyhydroxybutyrate):
– Biobased: Yes, produced by microorganisms from plant feedstocks
– Biodegradable: Yes, including in marine and backyard environments
– Bioplastic by all definitions
– Currently expensive; production scaling

Bio-PE (bio-polyethylene from sugarcane, Braskem’s “I’m Green”):
– Biobased: Yes, from sugarcane ethanol
– Biodegradable: No — chemically identical to petroleum PE
– Bioplastic by definitions 1 and 2, NOT by definition 3
– Behaves exactly like conventional plastic at end-of-life

Bio-PET (partially bio-derived PET):
– Biobased: Partially (typically 30%, the rest petroleum)
– Biodegradable: No — same as conventional PET
– Bioplastic by definitions 1 and 2, NOT by definition 3
– Used in some bottles, marketed as “plant bottle”

PBAT (polybutylene adipate terephthalate):
– Biobased: No — typically 100% petroleum-derived
– Biodegradable: Yes, in industrial composting
– Bioplastic by definitions 1 and 3, NOT by definition 2 (it’s not plant-derived)
– Often blended with PLA for compostable bag films

Starch-based plastics (e.g., Mater-Bi):
– Biobased: Yes, from corn or potato starch
– Biodegradable: Yes, often including backyard composting
– Bioplastic by all definitions

Cellulose-based films (e.g., NatureFlex):
– Biobased: Yes, from wood pulp
– Biodegradable: Yes, including backyard
– Bioplastic by all definitions

The takeaway: knowing the specific material name tells you what the product will do at end-of-life. Knowing only the marketing label “bioplastic” or “biobased” does not.

Why the confusion is profitable

The terminology vagueness isn’t accidental. There are commercial reasons companies use the broader, more flattering definitions:

Marketing premium: “Plant-based plastic bottle” sounds environmentally responsible. “Made from sugarcane” sounds great. Whether the material composts is rarely emphasized in the marketing because it would force the answer “actually, it doesn’t.”

Regulatory compliance via biobased content: Some sustainability programs (USDA BioPreferred, EU Green Public Procurement) reward biobased content regardless of biodegradability. A 30% bio-PET bottle qualifies for some preferential procurement even though it ends up in landfill the same as a regular PET bottle.

Sustainability reporting: Corporate ESG reports often emphasize “bioplastic content” or “biobased materials” without distinguishing whether those materials actually divert from landfill. A company can claim “50% of our packaging is now bioplastic” while every bit of it ends up in landfill alongside conventional plastic.

Consumer assumption gap: Most consumers assume “bioplastic” means “compostable.” Companies benefit from this assumption without explicitly making the (false) claim.

This isn’t all malice — many companies using biobased materials genuinely believe they’re making a meaningful environmental improvement, even when the material doesn’t compost. The carbon footprint argument has merit. But the marketing language often blurs the distinction in ways that mislead consumers about disposal.

What to look for on actual products

For consumers or buyers trying to evaluate a product:

Look for specific certifications, not vague claims:
– BPI Certified Compostable (US)
– TÜV OK Compost Industrial (commercial composting)
– TÜV OK Compost Home (backyard composting)
– ASTM D6400 or D6868 compliance

If a product carries one of these certifications, it actually composts under the corresponding conditions. If it only says “bioplastic” or “biobased” or “plant-based,” it might or might not compost — the marketing language alone doesn’t tell you.

Look for the specific material: PLA, PHA, PBAT, starch-based, cellulose-based — these are biodegradable. Bio-PE, bio-PET, bio-PP are not biodegradable (regardless of being biobased).

Look for end-of-life instructions: Products that compost will say where (industrial vs home). Products that don’t compost will be silent on disposal — that silence is a signal.

Be skeptical of “eco-friendly” or “green” labels alone: These are unregulated marketing terms that mean nothing specific.

What this means for foodservice operators

For operators choosing packaging, the practical implications:

For “compostable” claims to be defensible, the material needs to be one that actually composts — not just biobased. PLA, bagasse (paper-fiber, technically not even bioplastic), PHA, starch blends, paper-based products. Bio-PE doesn’t compost; using it doesn’t deliver the disposal benefit consumers assume.

For lifecycle carbon arguments, biobased matters even without biodegradability — bio-PE has lower upstream carbon than petroleum-PE even though disposal is the same. This is a legitimate sustainability metric for sourcing decisions, just not a compost claim.

Don’t mix terminology in customer communication. If your packaging is biobased but not compostable (e.g., bio-PE), don’t let the customer think it composts. The marketing dishonesty erodes trust if discovered, and it leads consumers to put the wrong items in compost bins.

For BPI/TÜV-certified compostable products, the language is clear and the certification carries weight. For products with vague “bioplastic” language, dig into what the actual material is before making sustainability claims.

The compostable foodware industry has standardized around certified biodegradable materials — bagasse, certified PLA, paper, certified starch blends — for exactly this reason. Operators sourcing from established compostable foodware suppliers (World Centric, Eco-Products, Vegware, Stalk Market) are working with materials that have clear certifications and clear disposal pathways.

Real-world examples that illustrate the gap

Three concrete cases show how the bioplastic/biobased confusion plays out in practice:

Case 1: Coca-Cola’s PlantBottle (2009-present). Marketed as a major sustainability advance because the PET was 30% bio-derived (sugarcane ethylene). Chemically identical to petroleum PET in performance and disposal. Recyclable in PET streams (good), not biodegradable, doesn’t compost. The marketing emphasized “plant” prominently; the disposal reality (landfill or PET recycling, same as before) was not. Consumers reading “PlantBottle” overwhelmingly assumed compostability, which the bottle never claimed but never explicitly denied either.

Case 2: LEGO’s bio-PE pieces (2018-present). LEGO began producing some pieces (mostly trees and plant elements) from bio-PE made from sugarcane. Press coverage frequently described these as “biodegradable LEGO” or “compostable plastic.” Neither claim is accurate — bio-PE is chemically identical to petroleum PE and will persist in the environment for centuries. LEGO’s actual claim was always about reducing the carbon footprint of new pieces (legitimate) rather than about end-of-life biodegradation (which they never claimed). The press coverage filled in the assumption.

Case 3: Compostable bag startups using PLA-PBAT blends. These are genuinely compostable in industrial facilities, certified by BPI, and break down within ASTM D6400 timelines. But marketing has sometimes implied backyard compostability — which most blends don’t achieve. Consumers who put these bags in home compost piles often see no breakdown after months and conclude (incorrectly) that “compostable” claims are fraud. The product is doing what it’s certified to do; the marketing or consumer expectation was wrong.

The pattern across all three: the technical truth is narrow and accurate. The marketing language is broad and flattering. The consumer interpretation is somewhere between the two, usually in the direction the company benefits from. None of these are fraud in the legal sense; all of them contribute to consumer confusion that erodes trust in the broader compostable/biobased category.

A consumer’s quick test

For shoppers evaluating a product with bioplastic-related claims:

1. Look for a compostability certification logo (BPI, TÜV).
2. If absent, look for the specific material name (PLA, PHA, bagasse vs bio-PE, bio-PET, bio-PP).
3. If neither, treat the product as “probably not compostable in the way you expect” until proven otherwise.

The terminology is unfortunately misleading by design. Companies that have done the work to certify their products say so prominently. Companies that use biobased petroleum-equivalent plastics often hide behind vague “bioplastic” or “plant-based” language because the certification would fail.

A reasonable summary

“Bioplastic” and “biobased” sound like they mean the same thing — environmentally responsible plant-derived materials that break down naturally. The reality is that the two terms describe different properties (feedstock vs end-of-life behavior) and that products can carry either or both labels while behaving very differently in compost or landfill.

For consumers and buyers who care about whether packaging actually composts, the right question is not “is this bioplastic?” or “is this biobased?” — it’s “does this carry a recognized compostability certification, and what’s the specific material?” The answers to those questions are clearer and more useful than the marketing labels.

For broader compostable packaging needs, established product lines like compostable food containers, tableware, and bowls work with materials (bagasse, certified PLA, certified paper) that have clear certifications and predictable disposal behavior. The marketing terminology is muddled across the industry, but the certified products are unambiguous.

The next time you see “made from bioplastic” or “biobased materials” on a label, the right reaction is curiosity rather than reassurance. The label might mean the product composts in 90 days. It might mean it lasts 500 years in a landfill, just like petroleum plastic. Without more information, the label alone doesn’t tell you which.

For B2B sourcing, see our compostable supplies catalog or compostable bags catalog.

Background on the underlying standards: ASTM D6400 defines the U.S. industrial-compost performance bar, EN 13432 harmonises the EU equivalent, and the FTC Green Guides govern how “compostable” can be marketed on packaging in the United States.