The skin care industry spends billions on topical products that work at the surface. But the cells that make up your skin — the collagen fibres that give it structure, the sebum that moisturises it, the barrier function that protects it — are built from the inside out, from the food you eat. A genuinely glowing complexion is, to a large extent, a nutritional outcome as much as a topical one.
This guide covers the key nutrients and foods that support healthy, radiant skin, and why the inside-out approach is so central to long-term skin quality.
Vitamin C and Collagen
Collagen is the primary structural protein of the skin — it provides the firmness, plumpness, and elasticity that characterise youthful-looking skin. Vitamin C is essential for collagen synthesis: without it, the body cannot complete the hydroxylation step that stabilises the collagen triple helix. Vitamin C deficiency leads to weakened collagen, poor wound healing, and skin fragility.
Beyond collagen synthesis, vitamin C is a powerful antioxidant that protects skin cells from the oxidative damage caused by UV exposure and pollution — both highly relevant for city dwellers in London. Best sources: red and yellow bell peppers (higher vitamin C content than oranges), kiwi, citrus fruit, strawberries, and broccoli.
Omega-3 Fatty Acids
The skin barrier — the outermost layer of the skin that controls water loss and protects against environmental insults — is composed partly of lipids including fatty acids. Omega-3 fatty acids support barrier integrity, reduce the transepidermal water loss that leads to dry, dull skin, and have direct anti-inflammatory effects that reduce redness and reactivity.
The most bioavailable omega-3s come from oily fish: salmon, mackerel, sardines, and herring. Flaxseed and chia seeds provide plant-based ALA, which converts to the EPA and DHA that directly benefit skin health at lower efficiency. For those who do not eat oily fish regularly, a high-quality fish oil supplement provides a practical alternative.
Antioxidants and Skin Protection
Oxidative stress — caused by free radicals from UV radiation, pollution, and metabolic processes — is one of the primary drivers of skin ageing. Dietary antioxidants neutralise free radicals and protect skin cells from this damage. The most skin-relevant antioxidants are:
Beta-carotene (found in orange and yellow vegetables: carrots, sweet potato, butternut squash, mango) accumulates in the skin and provides photoprotection. It is also converted to vitamin A, which regulates skin cell turnover.
Lycopene (found in cooked tomatoes) is a particularly potent antioxidant for skin photoprotection. Cooking tomatoes significantly increases lycopene bioavailability.
Polyphenols (found in dark chocolate, green tea, berries, and olive oil) have antioxidant, anti-inflammatory, and collagen-protective properties relevant to skin health.
Vanda's Kitchen at Selfridges Food Hall in EC4, near St Paul's Cathedral, incorporates a wide range of colourful vegetables and ingredients across its halal-certified, completely nut-free menu — particularly the fresh salad and vegetable-based dishes that provide these antioxidant nutrients in the most bioavailable whole-food form.
Zinc for Skin Repair
Zinc plays multiple roles in skin health: it regulates sebum production, supports wound healing, has anti-inflammatory properties, and modulates the immune response that can drive acne and other inflammatory skin conditions. Zinc deficiency is associated with delayed wound healing, inflammatory skin conditions, and poor overall skin quality. Sources: lean meat, legumes, seeds (particularly pumpkin seeds), and wholegrains.
Hydration and Skin Radiance
Adequate hydration is the most basic prerequisite for healthy-looking skin. Dehydration reduces skin elasticity, makes fine lines more visible, and produces the dull, congested appearance that no amount of topical product fully compensates for. Consistent adequate water intake — keeping urine pale straw-coloured throughout the day — is a daily maintenance requirement for good skin.
Foods with high water content — cucumber, tomatoes, celery, watermelon, citrus — also contribute to skin hydration while providing additional vitamins and antioxidants.
What to Limit for Better Skin
The positive nutrition is only half the picture. High-glycaemic foods, excess sugar, alcohol, and ultra-processed food all work against the nutrients you are adding in. Sugar in particular drives a process called glycation — the cross-linking of collagen fibres by glucose — that reduces skin elasticity and accelerates visible ageing over time. Reducing refined sugar is one of the highest-return dietary choices for long-term skin quality.
Vitamin E and Skin Barrier Support
Vitamin E works synergistically with vitamin C as an antioxidant, protecting cell membranes from oxidative damage and supporting the lipid barrier that keeps skin hydrated and resilient. Vitamin E is found in avocado, olive oil, sunflower seeds, and eggs. The combination of vitamin C and vitamin E in the diet provides significantly better antioxidant protection than either alone — another reason why a varied, whole-food diet outperforms supplementation of individual nutrients.
Good skin is built daily, through consistent food choices rather than occasional nutritional heroics. The cumulative effect of regular oily fish, plenty of colourful vegetables, adequate hydration, and minimal sugar and ultra-processed food becomes visible in skin quality over months — a genuinely inside-out radiance that no topical product fully replicates.