Respectful Insolence reports on an ancient, historic health product–basically, two cylinders, one of copper, one of zinc, that you hold (one in each hand). Yup.

I have improved on the idea.

This ancient pharmacology has long since proved its worth;
It’s the finest panacea in the history of earth.
Two simple metal cylinders can cure all of your ills—
So much better than injections; much more natural than pills!
…
But I’ve found a better system—I’ve improved upon their wand;
I’ve discovered new technology that lets me go beyond!
It’s a cure for diabetes; it’s a cure for aching feet
It’s a cure for halitosis, and that burning in your seat
It alleviates the symptoms of the flu and common cold
If you follow the instructions, it’s a cure for growing old!
It will tighten up your fanny, smooth the wrinkles on your skin,
And you’ll instantly feel better from the moment you begin!
What’s the closely-guarded secret? Well, you know I cannot say,
But you’re only growing older every moment you delay
There’s no need to spend your life in needless misery, alone,
When a cure is just a call away—so just pick up the phone!
…
You are now the happy owner of a marvelous device
Read and follow all instructions—you don’t want to do this twice.
The rods the ancient Pharaohs used (of copper and of zinc)
Were truly beneficial, but they also made us think:
If we mix the two together, will the alloy work as well?
We didn’t know, but clearly, an experiment would tell.
Through the miracle of science, our experiment confirms
That the wand that you have purchased will eliminate your germs;
If you use it as directed, we can gladly guarantee
(Or return for price of purchase, less a small restocking fee)
That wherever, on the road of life, your circumstances find you,
Our wand will let you always know, your worries are behind you.
Instructions: take the wand, all seven inches, gleaming brass,
And gently, but completely, shove the whole thing up your ass.