Any thoughts on AHCC Mushroom Compound

[Juls]

Have been doing some research and have come across this a few times -
Active Hexose Correlated Compound (AHCC) Mushroom Compound.

Said to be for Immune Support.

Widely used in Japan for Cancer patients. Being used in over 1,000 hospitals in Japan and a few in USA. (Can't find any info about UK) It must be pharma grade AHCC product.

In studies stage 4 patients 60 per cent alive @ 10 yrs compared to only 20 per cent of those not taking it.

It is an anti-oxidant & said to be safe with chemo or radiation.

Any thoughts? Good or bad.