How safe is hydroxypropyl starch ether (HPS)?

Feb 10, 2026

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Hydroxypropyl starch ether (HPS) is essentially harmless to humans under specified usage conditions and has been recognized as a safe food additive and industrial adjuvant by international and domestic authoritative organizations. It is widely used in food, pharmaceuticals, building materials, and many other fields.

 

Key safety points:

Sufficient toxicological evaluation: Multiple studies and assessments by authoritative organizations have shown that hydroxypropyl starch ether has extremely low oral toxicity. The oral LD50 in mice is greater than 15 g/kg (bw), classifying it as practically non-toxic. The FAO/WHO (1994) stipulates that its ADI (Acceptable Daily Intake) does not require specific limitation, and the FDA also lists it as a GRAS (Generally Recognized As Safe) substance.

Safe and compliant food application: When used as a thickener and stabilizer in food, its addition amount complies with the "GB2760 Standard for the Use of Food Additives." It can be used in appropriate amounts or limited quantities in various foods such as ice cream, dairy products, and canned goods, according to production needs.

 

For example:

Ice cream: Maximum usage is 12.0g/kg
Dairy products (such as yogurt): Can be used in appropriate amounts as needed for production
Jelly, instant noodles, etc.: All have clearly defined limits.

 

Special Populations to Note:

While safe for most people, caution is advised in the following situations:

People with allergies: A very small number of people may experience allergic reactions, such as itchy skin and swelling.

People with weak digestive systems: May cause bloating, indigestion, etc.; it is recommended to reduce intake.

Infants and young children, and those with renal insufficiency: Medical use should be under medical supervision to avoid the potential risks of high doses.

Distinction between Industrial and Food Grade: HPS used in building materials, papermaking, and other industrial fields may contain impurities and is not edible. Food-grade products must meet national standards to ensure that indicators such as heavy metals, arsenic, and chloropropanol meet the standards.

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