You have no idea of the ‘pickiness’ and sensitivity-to-everything of the guy we’re discussing - which I think is part of his many health issues.
But that’s a good idea; it might go down in tomato juice.
True. Other things that could work would be a good grape juice, maybe a tart lemonade. Something wih licorice in it.
If he likes chili or a spicy/peppery sauce it would blend in.
Severa drops of this with several drops of liquid smoke, mixed into a beef stew or gravy.