I want to point this drug out for those battling chronic illnesses related to a dysfunctional or sub-par immune system. It apparently works by temporarily blocking opioid receptors causing increased production of endorphins which then go on to have systemic effects.
http://www.lowdosenaltrexone.org/
I don't yet have a personal recommendation for LDN but there is compelling evidence of it's usefulness in a variety of diseases. Read about your particular illness and decide if it's worth a go.
From experience my personal bias regarding non-mainstream treatments is that most are useless but I have found the odd gem.
All the best,
Tony