Can taking copper supplement cause dark skin since copper is used by enzymes that make melanin?if so, is there a certain dose of copper i can take without causing my skin to darken?

It is very rare that you need copper supplement unless you have a serious gastrointestinal disease which causes copper malabsorption. If you truly need it and if you take an approved dose, your skin color should not be affected. Remember taking zinc supplement at high dose can be a risk factor for copper deficiency.

There is no need for you to be taking copper supplement unless there is documented deficiency which is very highly unlikely. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV vaccine. Wish you good health! Safe sex: https://www.hopkinsmedicine.org/he