Zinc interacts with other nutrients, and that’s one reason “more” can backfire. Excess zinc exposure has been associated with copper deficiency in kittens, affecting growth and overall condition (Hendriks WH, 2001). While most household supplements won’t recreate that exact scenario, it’s a clear reminder that minerals behave like a team, not soloists.
If your cat eats a complete and balanced diet, the decision to add zinc supplements for cats should focus on visible goals (skin comfort, coat luster, nail strength) and on choosing a product that doesn’t overload the mineral stack. When in doubt, ask your vet to review the full “daily intake” across food, treats, and supplements.