The Role of Zinc and Minerals in Skin Health

Last updated: 5 August 2026

Whilst vitamins and antioxidants receive most of the attention in skincare nutrition, minerals play equally vital yet often overlooked roles in maintaining skin health, supporting wound healing, and protecting against environmental damage. Zinc, in particular, is one of the most important minerals for skin, involved in over 300 enzymatic reactions, many directly relevant to skin function and aesthetic treatment outcomes.

Zinc: The skin's essential mineral

Zinc is the second most abundant trace mineral in the human body after iron, with approximately 6% of total body zinc concentrated in the skin. Its roles in dermatology are extensive and well-documented.

Key functions of zinc in skin health

• Wound healing: Zinc is essential for every phase of wound healing, from haemostasis through inflammation, proliferation, and remodelling. A review in Nutrients (2018) confirmed that zinc deficiency impairs wound healing at every stage
• Collagen synthesis: Zinc is a cofactor for enzymes involved in collagen production and cross-linking
• Antioxidant defence: Zinc is a component of superoxide dismutase (SOD), one of the body’s primary antioxidant enzymes
• Anti-inflammatory effects: Zinc modulates inflammatory cytokines, helping to control inflammatory skin conditions
• Cell division and DNA repair: Essential for the rapid cell turnover that occurs in the skin
• UV protection: Zinc oxide is a physical UV filter used in sunscreens, and intracellular zinc provides additional photoprotection
• Sebum regulation: Zinc helps regulate sebaceous gland activity, which is why it is used in acne management

Zinc is arguably the single most important mineral for skin health. Deficiency, even marginal deficiency that does not produce obvious clinical signs, can impair wound healing, increase susceptibility to UV damage, and compromise the results of aesthetic treatments.

Zinc and aesthetic treatments

Adequate zinc status is particularly relevant for patients undergoing aesthetic procedures:

• Post-procedure healing: Zinc-sufficient patients heal more efficiently after laser, microneedling, and surgical procedures
• Collagen-stimulating treatments: Biostimulators and microneedling rely on healthy collagen synthesis pathways, which require zinc as a cofactor
• Bruising recovery: Zinc supports the enzymatic breakdown and reabsorption of bruised tissue
• Infection resistance: Zinc is critical for immune function, reducing post-procedural infection risk

Other essential minerals for skin

Selenium

Selenium is a powerful antioxidant cofactor, particularly through its role in glutathione peroxidase, an enzyme that protects skin cells from oxidative damage. Research published in the Journal of the American Academy of Dermatology (2003) demonstrated that selenium supplementation protected against UV-induced skin damage in animal models, and epidemiological studies suggest protective effects in humans.

Copper

Copper is essential for lysyl oxidase, the enzyme responsible for collagen and elastin cross-linking. The copper peptide GHK-Cu has become a valued skincare ingredient due to its ability to stimulate collagen synthesis, promote wound healing, and provide antioxidant protection. Copper is also a component of superoxide dismutase alongside zinc.

Iron

Iron is necessary for oxygen transport to skin cells and is involved in collagen synthesis. Iron deficiency (with or without anaemia) is a common cause of hair loss, pale skin, and dark circles under the eyes. A study in the British Journal of Dermatology (2017) found that iron supplementation improved hair density in women with iron deficiency even in the absence of frank anaemia.

Magnesium

Magnesium is involved in over 600 biochemical reactions, including DNA repair, protein synthesis, and cellular energy production. In skin health, it supports barrier function, helps regulate inflammation, and is essential for the enzymatic processes involved in hyaluronic acid synthesis.

Silicon

Silicon is a trace element that plays a role in collagen formation and skin elasticity. A randomised controlled trial published in Archives of Dermatological Research (2005) found that oral silicon supplementation significantly improved skin roughness, elasticity, and nail and hair quality after 20 weeks.

Assessing mineral status

Many patients undergoing aesthetic treatments may have suboptimal mineral levels without realising it. Groups at particular risk include:

• Vegetarians and vegans (zinc and iron are less bioavailable from plant sources)
• Patients with digestive conditions (malabsorption)
• Those on restrictive diets
• Post-menopausal women
• People taking medications that deplete minerals (e.g., proton pump inhibitors reduce zinc absorption)

Blood tests can assess levels of zinc, iron, selenium, and copper. Some aesthetic practitioners now include mineral status assessment as part of their pre-treatment consultation, particularly for patients planning courses of collagen-stimulating treatments.

Dietary sources vs supplementation

Wherever possible, obtaining minerals from a balanced diet is preferable to supplementation:

• Zinc: Oysters, red meat, pumpkin seeds, chickpeas, dark chocolate
• Selenium: Brazil nuts (1-2 per day provides the daily requirement), fish, eggs
• Copper: Shellfish, nuts, seeds, dark leafy greens
• Iron: Red meat, lentils, spinach, fortified cereals (pair with vitamin C for absorption)
• Magnesium: Dark chocolate, avocados, nuts, whole grains, leafy greens
• Silicon: Oats, barley, rice, green beans, bananas

Supplementation should be guided by assessed deficiency rather than taken speculatively, as excessive intake of some minerals (particularly iron, selenium, and zinc) can cause toxicity.

Frequently asked questions

Should I take zinc supplements before aesthetic treatments?

If you have adequate zinc levels from your diet, additional supplementation is unlikely to provide extra benefit. However, if your levels are low or borderline, correcting this before treatments, particularly collagen-stimulating procedures, can optimise your healing response. A blood test can determine your zinc status. The UK recommended daily intake is 7mg for women and 9.5mg for men.

Can taking too many minerals be harmful?

Yes. Excessive supplementation can cause toxicity. Too much zinc can cause copper deficiency, too much iron can cause oxidative damage, and excessive selenium can cause selenosis (hair loss, nail brittleness, neurological symptoms). Always follow recommended dosages and ideally supplement based on confirmed deficiency rather than assumption.

Do topical mineral products work for the skin?

Some topical minerals have strong evidence behind them. Zinc oxide is an excellent physical sunscreen. Copper peptides (GHK-Cu) have strong evidence for collagen stimulation and wound healing. Topical magnesium may help with skin hydration. However, most minerals are better addressed through dietary intake or oral supplementation rather than topical application.

I am vegetarian, am I at risk of mineral deficiency affecting my skin?

Vegetarians and particularly vegans may be at higher risk of zinc and iron deficiency, as these minerals are less bioavailable from plant sources. This does not mean deficiency is inevitable, a well-planned vegetarian diet can provide adequate minerals. However, having your levels checked periodically is advisable, especially if you are experiencing skin concerns, hair loss, or poor wound healing.