Height variation is genetic but the genes responsible have eluded scientists. In Europe a study including 4 million people they found around 10 thousand DNA markers that appear to influence common genetic variants over height. Further research on this can help gain access to new biology and personalized medicine. These markers only had little to do with height variation and disease, but variants total are about 40% to 50% of total height. The more DNA they have, the easier it will be to understand, but it makes it harder since these specific genes are spread out through the DNA strand.