The benefits of wasabi, mustard, black pepper, cayenne pepper, jalapenos, etc are enormous and very healthful to the human body. Check out
this link for wasabi.
Cayenne pepper is said to have its most benificial use in cleaning out clogged arteries surrounding the heart that is caused by the eating of high fat content fast foods and I take it daily.
Whether it is true or not I cannot say as I am not a doctor or scientist, but I believe it to be so based on my last visit, three years ago, to the doctor. I was advised, because of my age, to have what is called a "Heart view" where the arteries are inspected for plaque. I underwent the procedure (which insurance would not cover! How stupid to not cover a preventative procedure, but that's the US medical system for you) at a cost of $100.
I am 52 years old and the results came back about a week later saying that I had "zero plaque" and my "heart age" was 35!
The doctor could not believe it and asked if I was a vegetarian. I answered no, I was not as I do enjoy my hamburgers, steak, cheese, pizza, and french fries now and then (only in moderation though).
In my opinion I believe my results were the cause of taking cayenne pepper daily in tomato/vegetable juice. (Cayenne capsuls are no good in that the hottness of the pepper on the tongue sends a signal to the stomach to start secreting chemicals to protect the stomach from the hot pepper). The pepper then does it's job of increasing the body's temperature to kill viruses and such (as they cannot survive in high temperatures. That's why you sweat when eating peppers) and cleaning out the blood vessels and arteries surrounding the heart. Cayenne pepper, as well as other peppers are considered the "Roto-Rooter" (a drain cleaning company in the US) for the arteries.
You can read about the benefits of cayenne pepper
here and
here.
Therefore, any and all peppers (the hotter the better) including wasabi have a very good effect on the human body and are nothing but beneficial. They are most definitely a part of my daily diet. Remember, it only burns twice. Once when it goes in and once when it comes out, but the benefits are well worth it! Your body will thank you and you will live longer.