The personal care composition according to claim 1 wherein said ester or ether of betulin is a compound according to the chemical formula: where R1 and R2 are independently H, an optionally substituted acyl group, or forms an optionally substituted ether group with the oxygen to which it is attached, with the proviso that at least one of R1 and R2 is an acyl or a hydrocarbyl group, wherein said op