Biphenylyl ethers of the formula R--O--CH.sub.2 --CR.sub.1 (OH)--CH.sub.2 Z wherein R.sub.1 is H or CH.sub.3 ; Z is dialkylamino of 2-8 carbon atoms, morpholino, pyrrolidino, piperidino, homopiperidino, hydroxypyrrolidino, hydroxypiperidino or hydroxyhomopiperidino; R is either biphenylyl substituted by at least one of F, Cl, Br, I, CF.sub.3, NO.sub.2 and piperidino or, when R.sub.1 is CH.sub.3 or when Z is homopiperidino, hydroxypyrrolidino, hydroxypiperidino or hydroxyhomopiperidino, unsubstituted biphenyl, and the physiologically acceptable acid addition salts thereof, possess cholesterol blood-level-lowering activity and can be produced by reacting a compound of the formula R--O--CH.sub.2 --Y wherein Y is ##STR1## or --CR.sub.1 (OH)--CH.sub.2 X, X being Cl, Br, I or a free or functionally modified OH-group, with an amine of the formula H-Z.