Not every product that we may consider cosmetic product in our everyday life would be classified as a cosmetic in regulatory terms. The first step in cosmetic product registration in any country therefore is to correctly classify your product. In order to do that, you have to know the definition of a cosmetic product.
A cosmetic product in Europe and UK is defined in the Regulation 1223/2009 as follows:
Cosmetic product means any substance or mixture intended to be placed in contact with the external parts of the human body (epidermis, hair system, nails, lips and external genital organs) or with the teeth and the mucous membranes of the oral cavity with a view exclusively or mainly to cleaning them, perfuming them, changing their appearance, protecting them, keeping them in good condition or correcting body odours. (EU Regulation 1223/2009, Article 2.1.a)