Vitamin C — ascorbic acid — is perhaps the most widely known micronutrient, typically reduced in public perception to "the thing in orange juice that prevents colds." Its actual biological role is far more extensive, and understanding its full function clarifies both why it's genuinely essential and why meeting requirements through food is straightforward for most people.
What Vitamin C Actually Does
Vitamin C is a water-soluble antioxidant that operates across multiple biological systems. Its most well-documented roles include: collagen synthesis (vitamin C is an essential cofactor for the enzymes that cross-link collagen molecules — without it, collagen production is impaired and wound healing fails, which is the mechanism of scurvy); iron absorption (vitamin C dramatically enhances non-haem iron absorption by keeping iron in its ferrous state, which is better absorbed — consuming vitamin C alongside plant iron sources increases absorption by up to 300%); immune function (it supports neutrophil function, lymphocyte proliferation, and antibody production); and antioxidant protection (neutralising free radicals in aqueous environments inside and outside cells).
The Cold Prevention Reality
The immune function evidence is real but more nuanced than popular belief suggests. A comprehensive Cochrane Review of vitamin C supplementation for colds found that regular supplementation does not prevent colds in the general population but does modestly reduce duration (by approximately 8% in adults, 14% in children) and may prevent colds in people under acute physical stress (marathon runners, soldiers in subarctic conditions) where supplementation shows more significant effects. This is genuinely useful but significantly less dramatic than "take vitamin C and avoid colds."
Skin Health: A Stronger Case
The evidence for vitamin C and skin health is stronger than the cold evidence. Vitamin C is required for collagen synthesis that maintains skin structure and elasticity. It's a potent photoprotectant — working synergistically with vitamin E to neutralise UV-generated free radicals. Adequate dietary vitamin C is associated with better skin hydration and reduced wrinkling in population studies. Topical vitamin C (in serums and skincare products) has separate, independently supported evidence for brightening, photoprotection, and collagen stimulation.
Best Food Sources
The UK reference nutrient intake for vitamin C is 40mg for adults — easily achievable from a single portion of many common foods. A half red pepper provides approximately 95mg. A kiwi fruit provides around 85mg. 100g of strawberries provides 57mg. An orange provides 50mg. Broccoli provides around 90mg per 100g portion. The highest concentrations are in raw fresh foods — vitamin C degrades with heat, so briefly cooked or raw preparations retain the most. Deficiency is rare in people eating a varied diet including fresh fruits and vegetables, though smokers have higher requirements (smoking increases oxidative stress that depletes vitamin C) and the elderly with poor appetites may be at risk.
Eat for Better Skin at Vanda's Kitchen
The dietary principles that support vitamin C and skin health described above are most practically implemented through consistent daily food choices. Vanda's Kitchen's Filipino-inspired menu is built around exactly the ingredients that skin health research supports: fresh vegetables rich in antioxidants and vitamin C, lean proteins that support collagen synthesis, and naturally anti-inflammatory preparations that reduce the systemic inflammation underlying many skin conditions.
For City workers who want to support their skin health through their daily diet, Vanda's Kitchen's freshly prepared lunch — certified halal, 100% nut-free, delivered to your EC4 office — provides a genuine nutritional improvement over the processed alternatives that dominate the London lunch scene. Read our healthy office lunch delivery guide and order for your team.
For related reading, see foods for glowing skin and anti-ageing nutrition guide. WhatsApp us or get in touch.
Fresh, Nutritious Food at Vanda's Kitchen
Vanda's Kitchen near St Paul's Cathedral EC4 provides one of the most nutritionally complete and allergen-safe food options in the City of London. Our Filipino-inspired menu is built around lean proteins, fresh vegetables, and complex carbohydrates — the nutritional combination that supports sustained energy, cognitive performance, and the various health outcomes covered in this article. Our food is certified halal, prepared in a 100% nut-free kitchen, and fully allergen-labelled, making it appropriate for the broadest range of dietary requirements in London's diverse workforce.
For City professionals who want genuinely nutritious daily lunches without leaving the office, our Freedom Tray delivery service provides fresh, labelled food to your desk from our EC4 kitchen. Our Selfridges Food Hall presence confirms the quality standard we maintain. To order for your team or to discuss corporate delivery, view our team lunch options, WhatsApp us, or send an enquiry. Read our healthy office lunch delivery guide for more on what we offer.
Why London Professionals Choose Vanda's Kitchen
Whether you are managing dietary requirements for a team, looking for a nutritious daily lunch, or sourcing catering for a corporate event, Vanda's Kitchen near St Paul's Cathedral EC4 provides a consistent answer. Our kitchen is 100% nut-free as a permanent standard — no exceptions, no special requests needed. We are independently certified halal through the Halal Friendly List. We hold a 5-star food hygiene rating and our products are stocked in Selfridges Food Hall.
Our food is freshly prepared daily from our EC4 kitchen, rooted in Filipino culinary tradition and designed to deliver both nutritional quality and genuine flavour. For corporate lunch delivery, team catering, and event food across London, we offer a complete solution with the allergen credentials, dietary certifications, and food quality that London's most demanding clients require. View our team lunch options, WhatsApp us, or send an enquiry — we respond the same day.