Sutherlandia frutescens

Sutherlandia frutescens or Cancer bush, is reported by some as being affective in the treadment of HIV/AIDS.
Several studies have been done however most seem to be inconclusive and advise further research. Indeed as indicated by the site (not to be confused by the suidlanders ;)), improvements are seen only

…in addition to meticulous attention to diet. Alcohol, recreational drugs and other drugs that damage the immune system should be avoided.

Not bad advice to any AIDS patient anyway. It is quite possible that it is this improved diet, not the plant that is beneficial to patients.