The health of your skin, hair and nails often mirrors what’s going on inside the body, yet the nutrients that support them are often overlooked. While collagen and hyaluronic acid are widely recognised, there are other players working quietly in the background to support strength, growth and repair.
Zinc, copper, niacin and vitamin C are among the lesser-known nutrients that contribute to the normal function of skin, hair and nails. Some are needed in only tiny amounts, but they act as cofactors for important biological processes, helping enzymes work properly, supporting cell turnover and keeping tissues resilient.Even mild imbalances in nutrient intake can influence how skin, hair and nails behave. Changes in texture, strength or appearance are often easy to dismiss or attribute to age or environment, but they may also reflect shifting nutritional needs over time.
Each of these nutrients plays a distinct role in the biological processes that keep skin, hair and nails strong and resilient.
1. Zinc: For Structure and Strength
Zinc is a trace mineral that contributes to the maintenance of normal skin, hair and nails. It plays a key role in the formation of keratin and collagen, the two structural proteins that give skin its firmness, and hair and nails their resilience.
One of zinc’s key functions is to support cell division and tissue repair. This is especially important for fast-growing cells like those found in the scalp, skin and nail beds. Zinc also helps maintain the integrity of the skin barrier, the outermost layer that protects against environmental irritants and water loss.For those with blemish-prone or oily skin, zinc may also support the balance of oil gland activity, and its antioxidant role helps protect skin cells from oxidative damage.
Zinc is naturally found in meat and shellfish, especially oysters, as well as seeds, legumes and wholegrains. However, the bioavailability from plant sources can be reduced by compounds called phytates, which may bind minerals and make them harder to absorb. Because zinc isn't stored in large amounts in the body, a consistent dietary intake is essential.2. Niacin (as Niacinamide): For Skin Energy and Barrier Function
Niacin, or vitamin B3, in the form of niacinamide is a well-tolerated, non-flushing form that supports skin at a cellular level. Niacin contributes to the maintenance of normal skin and is needed to produce NAD (nicotinamide adenine dinucleotide), a compound involved in energy metabolism and DNA repair.
In simpler terms, niacin helps skin cells do their job efficiently. It supports the renewal of the skin’s outer layer and the maintenance of a healthy skin barrier, which may help prevent water loss and keep irritants out.Topical niacinamide is often used in skincare to improve tone and texture. Internally, its benefits are more foundational: promoting calm, well-nourished skin from within and supporting the body’s natural repair mechanisms.
Good food sources of niacin include turkey, salmon, mushrooms, brown rice and peanuts. Inadequate intake can lead to skin that feels dry, reactive or slow to heal.3. Copper: For Collagen Cross-Linking and Natural Pigmentation
Copper is another trace mineral that plays a significant role in both the appearance and structural integrity of skin and hair. It contributes to normal skin and hair pigmentation and supports the maintenance of normal connective tissues throughout the body.
One of copper’s key functions is as a cofactor for enzymes that stabilise collagen and elastin fibres, which may help skin stay firm, elastic and able to withstand wear and tear. Copper also plays a role in melanin production, the pigment responsible for skin and hair colour. In the absence of sufficient copper, natural pigmentation may gradually fade, and structural support may become compromised.Copper works best when balanced with zinc. The two minerals share similar absorption pathways, so it’s important to maintain a healthy ratio. Excess zinc can reduce copper absorption, and vice versa, which is why they are often paired intentionally in well-formulated products.
Food sources of copper include lentils, sesame seeds, sunflower seeds, cashews, shiitake mushrooms and dark chocolate.
4. Vitamin B5 (Pantothenic Acid): For Skin Softness and Resilience
Pantothenic acid, or vitamin B5, is often found in topical skincare for its soothing and hydrating properties, but it plays an equally important internal role. It contributes to normal energy-yielding metabolism and is needed for the synthesis of coenzyme A, a compound involved in fatty acid metabolism.
These fatty acids form a vital part of the skin barrier, helping to retain moisture and maintain suppleness. When B5 intake is low, the skin may become dry, tight or more easily irritated.B5 also supports the regeneration of skin cells and contributes to overall tissue repair. It may be especially helpful during times of increased demand, such as hormonal shifts and seasonal changes.
Although deficiencies are uncommon, suboptimal intake may still impact skin quality over time. Good food sources include avocados, eggs, lentils, mushrooms and wholegrains.5. Vitamin C: For Collagen Formation and Skin Repair
Vitamin C is well known for its role in immune support, but it is equally important for skin health. It contributes to normal collagen formation and helps protect cells from oxidative stress, both of which are essential for maintaining healthy skin.
Collagen provides the structural framework for skin and connective tissue. Without adequate vitamin C, the body cannot form or stabilise collagen effectively, which may impact skin elasticity, wound healing and overall tone.Vitamin C also plays a role in the regeneration of vitamin E and helps increase the absorption of iron from plant-based sources, indirectly supporting oxygen delivery and nutrient flow to skin and scalp cells.
As a water-soluble vitamin, vitamin C is not stored in large quantities and is easily depleted by emotional overwhelm, smoking or pollution. Daily intake is best achieved through colourful fruits and vegetables such as peppers, citrus fruits, berries, kiwis, broccoli and greens.The Small Nutrients That Make a Big Difference to Hair, Skin and Nails
While collagen and hyaluronic acid are important for visible results, the nutrients that support the structure, energy and resilience of the skin often go unnoticed. Zinc, copper, niacin, vitamin B5 and vitamin C each play a role in supporting healthy skin turnover, strong hair follicles, and well-nourished nail beds.
Addressing a shortfall in any one of them may not lead to overnight transformation, but building a solid nutritional foundation often restores function from the inside out. The result is not just aesthetic but cellular, helping your body do what it’s designed to do with a little more ease.If you’ve been focused on one or two nutrients alone, this might be the gentle nudge to broaden your approach. These are small but mighty allies, and they’re often exactly what your skin, hair and nails have been asking for.
*The advice in this article is for information only and should not replace medical care. As with any nutritional supplement please consult your qualified healthcare professional before use, especially if pregnant, breastfeeding, if you have a known medical condition or are taking medication. Food supplements must not be used as a substitute for a varied and balanced diet and a healthy lifestyle.
