My daughter improved within about 5 days of starting the GSE and acidophilus. She became much less aggressive and better attention. If your child is not high yeast the results won't be very profound. You will probably NOT see the quick effects that the stimulant medications give with ANY nutritional supplement.
Supplements are usually more slow in coming and less dramatic in the effect.
However, with the right adjustments you can make some major improvements. Be patient and don't give up too quickly. Take notes of the little things. Often it takes time to get the body chemistry back to where it should be. Others see really good effects with the Essential Fatty Acids.