Be aware that the type of ALA you get is very important. The typical ALA supplements are racemic mixtures which have both enantiomers the Left and the Right. Having the L in there not only blocks the receptor site (if I recall correctly) but also changes the behavior of the R. It is also found that the Na (sodium) bound ALA gives the best response.

So basically what you're really looking for is Na-R-ALA. This will give the the true response of ALA if it is what can help you. Other brands have the potential of giving a false negative/null response.

I'd suggest looking at "Doctor's Best Na-R-ALA"