Hydroxypropyl cellulose, low-substituted (LHPC)
Score impact
0.00
points/product
Description
The food additive E463A, also known as low-substituted hydroxypropyl cellulose (LHPC), is a thickener, stabilizer, and emulsifier used in the food industry. It belongs to the group of modified celluloses, derived from natural cellulose present in plant cell walls. It is obtained by reacting cellulose with propylene oxide under controlled conditions, introducing hydroxypropyl groups into the cellulose chain.
The degree of substitution (number of hydroxypropyl groups per glucose unit) is low, which gives it specific solubility and viscosity properties. LHPC is a white or slightly yellowish powder, odorless and tasteless, soluble in cold water forming viscous colloidal solutions. Its main function is to thicken, gel, and stabilize emulsions, improving the texture and consistency of foods.
The history of its use as a food additive dates back to the mid-20th century, when modified celluloses were developed for industrial applications. In the European Union, E463A is authorized as a food additive according to Regulation (EC) No 1333/2008, and has been evaluated by the European Food Safety Authority (EFSA) and the Joint FAO/WHO Expert Committee on Food Additives (JECFA). EFSA established an acceptable daily intake (ADI) of 25 mg/kg body weight per day for hydroxypropyl cellulose in general, based on toxicological studies that showed no significant adverse effects. The WHO also supports its safety at authorized doses.
Regarding labeling, it must appear as 'hydroxypropyl cellulose' or its E number. The overall safety assessment is high, considering it a safe additive for the general population when consumed within established limits. No relevant side effects have been documented in humans, although at very high doses it could have a mild laxative effect due to its water-holding capacity.
In summary, E463A is a widely used and safe food additive, supported by major food safety agencies.
E463A is mainly used as a thickener, stabilizer, and emulsifier in a wide variety of foods. According to Regulation (EC) No 1333/2008, it is authorized in categories such as fine bakery products (e.g., cakes, cookies), dairy products (e.g., yogurts, dairy desserts), sauces and condiments, ice cream, processed meat products, and non-alcoholic beverages.
In the Spanish market, it is found in products such as custards, flans, vegetable creams, salad dressings, and some ice creams. Usage limits vary by category, generally between 0.5 and 10 g/kg, with a common range around 1-5 g/kg. Compared to the FDA, which also approves it as a direct food additive (GRAS), the limits are similar. In Japan, its use is permitted under certain conditions.
The versatility of E463A makes it ideal for improving texture and preventing phase separation in processed products.
E463A has been evaluated by EFSA and JECFA, concluding that it is safe at authorized doses. No significant adverse effects have been documented in humans. In animal studies, very high doses (above 5000 mg/kg/day) caused diarrhea and changes in gut microbiota, but these levels are not relevant for human consumption.
The biological mechanism is based on the fact that hydroxypropyl cellulose is not digested or absorbed in the gastrointestinal tract, acting as dietary fiber. In sensitive individuals, very high doses could cause mild laxative effects or abdominal discomfort, but there is no evidence of systemic toxicity. No interactions with medications are known. EFSA established an ADI of 25 mg/kg/day, which is widely safe considering that estimated intake in the population is much lower.
In conclusion, E463A is considered safe for the general population, including children and the elderly, with no documented side effects under normal use conditions.
- Hydroxypropyl cellulose
- LHPC
- Low-substituted hydroxypropyl cellulose
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