This would seem to be a contrary message for a book that purports to cure constipation.

It's also a contrary take on the Depression. In times of great economic contraction, you usually don't encounter lines like "don't try to gain weight by stuffing yourself with food."

Drink a quart of milk! Lots of cream soups! BACON! FAT MEATS! MORE POTATOES! PASTRIES!

Oh, you'll gain. Don't worry.