He adds, “Vitamin B3 and B6 deficiencies have also been associated with dark lips. Zinc deficiency is another potential cause of lip discoloration. Zinc is a crucial mineral for skin health, and a deficiency can lead to a range of skin issues, including dark lips. Additionally, iron deficiency anemia can cause pale lips, but this is not typically associated with darkening of the lips.... https://mycuraskincare.com/