Tuna Diet

I first heard of this when reading about Christian Bale's dramatic weight loss for The Mechanic.  He ate only 1 can of tuna and 1 apple per day for 4 months.

This version of the Tuna diet comes from body builder Dave Draper.  First take your body weight in pounds.  That is how many grams of protein you need per day.  A single 5.5 ounce of tuna has 20-22 grams of protein.  So for a 200-lb person, you would need to eat about 10 cans of tuna, spread over 6 meals.  So eat 1.5 cans of tuna for each meal.  You also need branch-chain amino acids, vitamins and minerals, and metamucil.  And water, liters and liters.  Do this for 3 days.  Later in the week add salad and low-fat dairy, like low-fat cottage cheese.

This sounds very similar to the Dukan/South Beach diet plan.  What do the haters have to say about it?

Fails to provide adequate calories. It slows your metabolism, impairs muscle mass, is unsustainable and fails to improve body composition.
It can cause mercury poisoning.  It's dangerous.
It's short-term.  It only last 3 days, which makes it a fad diet.
Rabbit starvation.  (After 3 days, I think not.)

To me, it sounds like someone is jealous.  I think this is worth a try.  Although I can't eat 10 cans of tuna a day.