What Causes Unusual Change In Stool Color?

Yes, Iam a 57 year old female, always been very healthy, take no medications, get regular physicals every year. The past few weeks my stools have become very yellow in color. The only thing I have changed is I have added ultra CoQ10 to my diet & fish, flax & borage oil to my diet. I also started adding hemp seeds to my shakes or cereal. Could this cause the change in color?