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adreno said, a gene test is for the sequence of nucleotides which is inherited from your parents. This is known as genotype. Your results from whatever gene testing you did (e.g. 23andMe) refer to this sequence of nucleotides. You cannot improve your gene test results, although I believe scientists are working on this problem.
Some genes have a lot of influence on what happens, and some have less or little. I do not know what category these specific mutations fall into. However it seems some people with these sorts of changes improve and there does seem to be hope for us all.
There is other information in the proteins around the genes (they are coiled around these round proteins with basically tails--the tails can be compared to a tag on a package. There are also other proteins also, which attach to the DNA), and these proteins give information about such things like how tightly to pack the genes. If they are packed tightly enough they are effectively deactivated. If needed to make a protein, they will need to be packed more loosely. I think it also might help "decide" when a gene is needed, although I do not recall for sure.
This information in the proteins is not genetic (i.e. it is not information coded in the sequence of DNA). It is called epigentic (meaning "upon the genes" or something like that).
Some epigenetic information is inherited, particularly from the mother (although a very small amount is inherited from the father). A lot of it is restarted rather than inherited, however. Some (lots?) is amenable to change.
Some of the information in the proteins is in methyl groups, a biochemical structure made of a carbon atom bonded to a main atom of whatever structure it's attached to (usually another carbon, but it could be sulpher or something like that) with nothing but three hydrogen atoms around the carbon atom. Methyl is -CH(3). It can be supplied by good forms of folate, SAM-e, etc.
http://learn.genetics.utah.edu/content/epigenetics/intro/
