Abstract: The invention relates to a cosmetic composition of two polysaccharides based on fucose and rhamnose, and to the use of the same especially in topically applied products which are used to act on cutaneous, epithelial and conjunctive tissue, especially for cosmetic anti-ageing effects.

Abstract: The present invention relates to a mixture of non-sulfated fucose-based oligosaccharides, characterized in that it comprises oligosaccharides of less than 13 saccharide units, comprising at least one fucose unit in a non-reducing end position, and in that at least it is capable of being obtained by means of a process that comprises at least one step of degradation of a polysaccharide from a microorganism of the gender Klebsiella pneumoiae subsp. pneumoniae. This new mixture presents significant activities on different components of the skin, providing a clearly visible anti-aging result, specially by an excellent thickening of the skin.

Abstract: Composition for the treatment or prevention of the symptoms of connective tissue ageing, characterized in that it contains one or more oligosaccharides with 2 to 5 oligosaccharide residues or a derivative of said oligosaccharide(s) containing a hydrophobic residue, with the proviso that one galactose residue be present in a non-reducing terminal position of said oligosaccharide(s).

Abstract: The invention relates to pharmaceutical and cosmetic compositions comprising at least one benzisothiazolinone-1-dioxide derivative with the formula: ##STR1## where R.sup.1 can be hydrogen, and R.sup.2 can be certain generally hydrophobic C.sub.8 -C.sub.20 aliphatic groups or the group: ##STR2## where R.sup.5 is aliphatic or else R.sup.2 is a saturated or unsaturated C.sub.2 -C.sub.6 group ending in an aromatic nucleus.These compositions can be used to inhibit elastases such as human leucocytic elastase. They may be applied topically as a cosmetic.Many of the benzisothiazolinone-1-dioxide derivative specified as active ingredient in such compositions are novel compounds.

Abstract: Lipopeptides of the formula, R--X--(P.sub.1).sub.x -(L--Ala--L--Ala--P.sub.2 --A wherein x is 0 or 1, R is the acyl residue of a hydrophobic carboxylic acid, P.sub.2 is, for instance, L--Ala, L--Val, L--Pro--L--Ala or L--Pro--L--Val, P.sub.1 is a residue of an amino acid or an oligopeptide formed from 2-8 amino acids, X represent a divalent group or a direct covalent bond and A represents the C-terminal portion (modified or not) of --(P.sub.1).sub.x --(Ala--Ala--P.sub.2). These lipopeptides can be used as elastase inhibitors.