Dietary supplements can support health, but taking more than the body needs may backfire—especially for skin. Nutrients beneficial in small amounts can cause problems when overconsumed.
Iodine, essential for thyroid function and found in many foods and supplements, can disrupt hormone balance in excess. Because iodine is released through sweat and oil glands, too much may trigger acne, redness, or inflammation—even in people who normally have clear skin.
Iron, critical for oxygen transport, also requires caution. The body has limited ways to remove excess iron, which can increase oxidative stress, damaging collagen and elastin, leading to dullness, fine lines, and reduced elasticity over time.
Since iodine and iron are common in diets, unnecessary supplementation can push intake beyond safe levels. Dermatologists recommend supplements only when medically indicated, as healthy skin relies on balance—not excess.