It was also used by Russian doctors to help people in Chernobyl and it worked for them.
Meg Wolff has a good post on it here.
This is a PDF download on Miso's great benefits.
Info on miso and here
Do your own research but always rely on your doctors advice,
Here is the sea, great and wide,
which teems with creatures innumerable,
living things both small and great.
There go the ships,and Leviatan, which you formed to play in it.
These all look to you,to give them their food in due season.
When you give it to them, they gather it up;
when you open your hand, they are filled with good things.
When you hide your face, they are dismayed;when you take away their breath, they die and return to their dust.
When you send forth your Spirit, they are created,
and you renew the face of the earth.