Patent ID: 7727973

Claim:
A method to protect the skin against the damaging effects of UV radiation, the method comprising applying to skin in need thereof an effective amount of at least one substantially pure lipid A-type compound of formula (I): in which: AG 1 denotes a 3-hydroxydecanoyl group, AG 2 denotes a 3-dodecanoyloxydecanoyl group, R independently denotes a hydrogen atom or a group PO(OR′) 2 , and R′ independently denotes a hydrogen atom, a saturated or unsaturated, linear or branched C 1 -C 6 alkyl group, or a phenyl or benzyl group, the following salts thereof when at least one R denotes a group PO(OH) 2 : inorganic salts, primary, secondary and tertiary amine salts, and phosphoethanolamine salts, and mixtures thereof.