Cyclopentasiloxane vs Calcium Disodium EDTA: which is worse?
Quick answer: Both score equally on our risk model. Cyclopentasiloxane is restricted in the EU and allowed in the US; Calcium Disodium EDTA is — in the EU and — in the US.
| Property | Cyclopentasiloxane | Calcium Disodium EDTA |
|---|---|---|
| EU status | Restricted | — |
| US status | Allowed | — |
| Risk level | medium | — |
| Banned in | — | — |
| Restricted in | European Union | European Union (restricted to specific food categories; not approved for many applications permitted in US) |
| Category | endocrine disruptor | additive |
| Where it hides | hair serum, primer, deodorant | — |
What is Cyclopentasiloxane?
Cyclopentasiloxane is a volatile silicone (D5) used for smooth, silky texture.
What is Calcium Disodium EDTA?
Calcium disodium EDTA (ethylenediaminetetraacetate) is a chelating agent used as a food preservative. It binds metal ions (particularly iron and copper) that would otherwise catalyze oxidative and color-degradation reactions in foods. It prevents color loss, flavor changes, and bacterial growth in certain foods.
Documented risks
Cyclopentasiloxane: Persistent and bioaccumulative; the EU restricts D5 in wash-off products over environmental and endocrine concerns. The US has no restriction.
Calcium Disodium EDTA: EDTA chelates essential minerals including zinc, iron, calcium, and magnesium in the gut, potentially reducing absorption of these nutrients with regular consumption. Animal studies at high doses show reproductive toxicity and zinc deficiency effects. EFSA's safety assessment noted that EDTA could reduce zinc bioavailability at consumption levels that could be reached by high consumers of EDTA-containing foods. The ADI is 1.9 mg/kg body weight. EDTA's poor biodegradability also makes it an environmental concern — it accumulates in water supplies and can mobilize heavy metals in sediments.
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