The appearance of our skin is constantly changing and age, diet, pollution and sun all play a part in this. If hoping to achieve healthy, glowing skin at any age, an expert shared some foods to add to your trolley, including nuts and fish. Registered nutritionist Dr Lucy Williamson advised Britons to look for foods that are naturally high in skin-boosting vitamins. This includes meals high in healthy fats and omega-3 as studies have shown this can improve hydration and reduce the signs of ageing. Dr Williamson said: “Increase your healthy omega oils, especially omega-3 and omega-7. That means …