What “food grade silicone” actually means

Short answer: “food grade silicone” is not a certification. No agency issues it, no body audits it, and no law defines it. It is a phrase manufacturers write on their own packaging. That does not make silicone dangerous — it means the label is telling you nothing you can check.

There are two real standards behind the phrase, and they are not the same thing. Knowing which one a product actually meets is the difference between a claim you can verify and a claim you cannot.

The two standards that actually exist

FDA 21 CFR 177.2600 — the American one

The regulation is titled “Rubber articles intended for repeated use”. It does not certify anything. It sets out which substances may be used to make the rubber, and then requires that the finished article pass extraction limit tests — the article is boiled in distilled water and then in n-hexane, and the amount of material that comes out has to stay under stated limits.

Two things follow from that, and both matter when you are reading a product page:

• Compliance is something a manufacturer determines, usually through a testing house. There is no FDA registry of approved silicone spatulas you can look up.
• “FDA compliant” and “FDA approved” are not the same claim. The FDA does not approve cookware. A brand writing “FDA approved silicone” is, strictly, overstating it — which is the sort of thing we dock points for on the scored list.

LFGB — the German one, and the reason it appears on packaging

LFGB is short for the Lebensmittel- und Futtermittelgesetzbuch, Germany’s food and feed code. The silicone test associated with it is generally stricter than the FDA’s: it includes a migration test and, in the commonly used version, a physical test in which the material is folded and twisted to see whether it releases a white residue.

A product can be FDA-compliant without ever being LFGB-tested, and the reverse. When a brand names LFGB specifically — as PlanetBox does for the silicone in its lunchboxes — it is making a narrower, more checkable claim than a brand that writes only “food grade”.

What actually migrates out of silicone

This is where the honest answer gets more interesting than either the marketing or the scare stories.

In 2025, researchers at Health Canada published a study of silicone bakeware measuring cyclic siloxanes — ring-shaped silicone molecules left over from manufacturing. They found them in every product tested, at roughly 680 to 4,300 micrograms per gram of silicone. After one bake, about 105 micrograms per gram migrated into an oily food simulant, and indoor air during the baking hour rose sharply. Health Canada’s own write-up of the work is here.

Now the part that most coverage leaves out. The same researchers were explicit about the limits of what they had done: one temperature, one duration, and an oily simulant rather than real food. And Health Canada’s formal 2023 assessment of siloxanes as a group had already concluded they were not harmful to human health at estimated exposure levels. The 2025 bakeware work was framed as filling a data gap, not as overturning that finding.

A second study is worth knowing about and worth reading carefully. Feng and colleagues (2023) tested 42 silicone food-contact products bought in China — 31 kitchenware items and 11 bottle nipples — and reported that almost all of the kitchenware samples showed cytotoxicity in cell assays, with a majority showing estrogenic activity. The bottle nipples showed no toxic effects.

Before that number does any work on you: the extraction used 95% ethanol at 70°C for two hours. That is an aggressive solvent, chosen deliberately to pull out whatever can be pulled out. It is not a model of a spatula in a saucepan. The study tells you what can come out of some products under hard conditions. It does not tell you what does come out of yours during dinner.

So is silicone safe?

No regulator has restricted food-contact silicone as of September 2026. There is no ban, no recall, no advisory. Set against that, there is real published evidence that silicone bakeware releases measurable siloxanes when heated, and that some products carry more residual material than others.

Both of those are true at once, and the responsible summary is the boring one: silicone is not the thing in your kitchen we would worry about first. If you want to worry about something, the bamboo-melamine composites have an actual regulator telling people to stop using them, which silicone does not.

What we’d actually do

• Treat “food grade” as decoration. It is unregulated. Look for a named standard instead — LFGB, or a specific citation of 21 CFR 177.2600.
• Prefer LFGB where it is offered, not because FDA compliance is bad, but because a brand that names the stricter standard has told you something more specific.
• Do the fold test on anything already in your drawer. Twist a corner hard; a white streak suggests filler.
• Bakeware is the higher-exposure case, not spatulas. Heat and time drive migration, and a spatula touches a hot pan for seconds.
• Do not replace a working silicone item on this evidence. There is no regulatory finding against it, and buying a new one has its own cost.

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