It is generally accepted that tolerance of alcohol diminishes with age and it is prudent for pensioners to moderate their drinking in order to avoid any likely ill effects.
If possible, you should adhere to the current guidelines, which recommend the consumption of at least five a day, with the most beneficial combination being
1 small can of lager
1 butt of malmsey
1 scuttlebutt of moose milk
1 firkin of febrifuge
1 hogshead of shandygaff
This, of course, should be complemented by a balanced diet and regular exercise.