Once of the diets advocated by Vince Gironda that is often referenced is the Hawaiian Reducing Diet.
This diet is simplicity itself. It consists of red meat, chicken or fish and papaya or pineapple 2-3 times per day. The secret of this combination is the high enzymatic activity produced by the papaya and the pineapple. This diet is good for one-pound fat loss per day.Vince Gironda, c. 1971
That snippet was from an IronMan magazine in which Vince gave out a few tidbits, so no more information than that was provided in the article.
However, it was based on the details contained in the Gironda Talks! Audio Seminar where he explained his usage of digestive supports for fat loss and how enzymes, amongst other supplements, can be used.
Papaya and pineapple are the two most potent enzyme fruits on the market today. Dr. Yu in Hawaii allows a papaya or 4 to 6 ounces of pineapple at each and every meal providing the meal is fish, meat, chicken, eggs.
And you get a pound a day weight loss through this diet.
Although the carbohydrate level is quite high the enzymatic activity is so great that it burns off and combusts the carbohydrate in the pineapple and papaya.