In Thunderball, James Bond has just been told by M that he is being sent to Shrublands for a two-week course of treatment. As the leaves the office, he vents to Moneypenny, who explains that M himself had recently taken the treatment, and this has been the result.

Anyway, that’s what’s happened and I must say I’ve never seen him in such wonderful form. He’s absolutely rejuvenated.” “He looked like that blasted man in the old Kruschen Salts advertisements. But why does he pick on me to go to this nuthouse?”

Kruschen Salts are a mixture of six salts and citric acid, used as a digestive cleanser, to eliminate toxins from the body and to keep regular. People with Gout or Rheumatoid Arthritis also use it to alkalinise their bodies.

I can’t be sure that this is the one that Bond is referring to, but it seems to fit.

He couldn’t have meant this one, could he?