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There are many examples in nature for necessity and application of protective casings: to survive their metamorphosis into a butterfly, caterpillars encase themselves as a pupa. Aphids excrete water-repellend substances as a protective covering against desiccation and rain. Even plants seal tissue damages with resin or encase themselves in a layer of wax to protect against desiccation.

The term “protective encapsulation” describes packaging of active substances, e.g. vitamins, preservatives or enzymes within a micro- or nano-capsule. Protective capsules are found e.g. in food products, cosmetics, drugs and fertilisers. Active ingredients can often be better targeted if encapsulated. Furthermore, many substances can only be used as an encapsulated preparation.

Protective capsules help to protect enclosed active ingredients and support a longer shelf life. They also improve a uniform distribution and release of active ingredients during an application.
Especially cosmetics with sensitive active substances benefit from protective encapsulation, as well as foodstuff presenting a complex biological system (that have to be carefully processed).