“Eyes, Pansay—all Eyes, Brain, and Stomach. And the greatest of these three is Stomach. You’ve too much conceited Brain, too little Stomach, and thoroughly unhealthy Eyes. Get your Stomach straight and the rest follows. And all that’s French for a liver pill. I’ll take sole medical charge of you from this hour! for you’re too interesting a phenomenon to be passed over.”
This is from "The Phantom Rickshaw" by Rudyard Kipling.
I don't understand the meaning of
And all that’s French for a liver pill.