Evidence check: Zink in the context of skin aging

Zinc is an essential trace element important for skin health, involved in collagen synthesis, wound healing, and antioxidant defense. Some evidence suggests that zinc deficiency may accelerate skin aging by impairing these processes. However, the direct evidence for zinc supplementation slowing skin aging in well-nourished individuals is weak. Most studies are mechanistic or observational; robust human trials are scarce. Additionally, excessive zinc intake can lead to copper deficiency and other adverse effects. Therefore, while zinc status is relevant for skin health, the evidence for anti-aging benefits from supplementation is moderate at best. Consumer zinc tests can identify deficiency but should not be used as a standalone guide for anti-aging interventions. A balanced diet rich in zinc (e.g., oysters, meat, nuts) is generally sufficient. Evidence grade: mechanistic/moderate.