Veganism in the UK has moved from a niche lifestyle choice to a mainstream dietary pattern — with approximately 3% of UK adults identifying as vegan and a further 15-20% as flexitarian. A well-planned vegan diet supports excellent health outcomes; a poorly planned one creates specific, predictable nutritional risks. This guide covers the evidence-based approach to vegan nutrition in the UK context. See our protein guide, our omega-3 guide, our vitamin D guide, and our iodine guide for the detailed nutrient-specific context.
The nutrients that require specific attention on a vegan diet
B12 is the single non-negotiable supplement for all vegans — it is found almost exclusively in animal products, and deficiency produces irreversible neurological damage if prolonged. NHS guidance recommends supplementation for all vegans. Iodine is the second critical nutrient — cow's milk (the primary UK iodine source) is absent from the vegan diet, and most plant milks are not iodine-fortified; choosing an iodine-fortified plant milk or supplementing is essential. Vitamin D requires supplementation for all UK adults year-round — veganism does not alter this. Omega-3 DHA/EPA from oily fish is absent from the vegan diet; algal DHA/EPA supplements (the direct plant-derived source that fish also eat) are the evidence-based solution.
Protein on a vegan diet
Complete protein from plant sources requires combining complementary amino acid profiles across the day — legumes (lysine-rich) with grains (methionine-rich) provides all essential amino acids. Practical high-protein vegan meals: lentil dal with rice (combining legume and grain proteins); chickpea and quinoa salad (quinoa is a complete protein); tofu stir-fry with edamame; soy yoghurt with nuts and seeds. Soy protein (tofu, tempeh, edamame) is the only plant protein with a complete essential amino acid profile comparable to animal protein.
The well-planned vegan diet in practice
A nutritionally complete vegan diet requires B12 supplementation (1000mcg weekly or 25-50mcg daily), vitamin D supplementation (10-25mcg daily), algal DHA/EPA supplementation (250-500mg daily), iodine-fortified plant milk or supplementation, and calcium from fortified plant milks, tofu, and leafy greens. Beyond these non-negotiable additions, a diverse, whole-food plant-based diet naturally provides excellent nutrition — and aligns closely with the evidence-based dietary patterns associated with best health outcomes. Vanda's Kitchen's diverse menu includes excellent plant-based options — see our allergen matrix to identify the full vegan range.
For more health and nutrition guidance, explore the Vanda's Kitchen blog. Our certified halal, 100% nut-free kitchen at Carter Lane EC4 delivers freshly prepared food to City offices daily. View our team lunch menu or WhatsApp us. Full allergen labelling on every item. Selfridges quality standard. Contact us about corporate catering.