The way you choose to make the transition to a diet higher in vegetables is crucial, even if you include some fish and meat.
It helps to make the transition slowly. Start by incorporating one meat-free meal — or an entire meat-free day — each week, and build from there. And remember, there are plenty of unhealthy vegetarian choices out there.
Vegans need to be particularly vigilant about vitamin B12, iodine and omega-3s, which can all be lacking in a poorly planned vegan diet. Talk to your GP about a B12 supplement if you are concerned.
Even if you occasionally eat red meat, your iron and selenium intakes may become low. As you gradually eat less meat, fish and dairy foods, you may also need to consider whether you’re getting enough vitamin B12.
Relying on fish for your main source of protein is fine, but vary it so that you consume oily fish such as salmon and tuna at least twice a week to make sure you get your necessary intake of healthy omega-3 fats.