It may be very good anti-oxidant, thus it may prevent free radical damage to cells especially when combined with other anti-oxidants. It may also work to help regulate insulin levels, help transport glucose to muscle and possibly help in reducing overall bodyfat.
ALA can increase glucose uptake by muscle cells and decrease glucose uptake by fat cells - one of the reasons why so many people feel more pumped and muscular.
I sell racemix ALA for $24.99 for 180 caps 300 mg (professionally capped of course) available at sknutrition.com