Their R-ALA is called Glucorell-R. General dose for R-ALA is 100mg for every 30-50g of carbs. If you are using regular ALA (which is a combination of S and R, not just R-ALA) then increase the dose.
r-ala dosage = 100mg per 30 carbs
ala dosage = 300mg per 30 carbs (though this can change depending on the brand and the ratios of the racemic mixture)