As veganism becomes more mainstream and the amount of products on offer grows, the question is no longer “why are you vegan?” but “why aren't you vegan?”.

Vegans don’t consume any animal products, while also ditching leather, fur and silk.

Here are a few of the many reasons that people are going vegan faster than you can say “pass me the fakin' bacon”.

A meaty fry-up can be carcinogenic

A full English breakfast (Dan Kitwood/Getty Images)

A report just released by the World Health Organization warns that processed meats rank alongside cigarettes as a major cause of cancer.

According to the findings, 50g of processed meat a day – the equivalent of one sausage or less than two slices of bacon – increases the chance of developing bowel cancer by 18 per cent.

It's the best way to help animals

Auckland welcomes new born lambs (Jason Oxenham/Getty)

There is simply no better way to help animals and prevent their suffering than by going vegan. In many industrial farms, animals are kept in cramped conditions, and will never raise families, forage for food or do anything else that is natural and important to them.

Most won't even get to feel the warmth of the sun on their backs or breathe fresh air until the day they are loaded onto lorries headed for the slaughter house.

We are not baby cows

Milk (Graeme Robertson/Getty Images)

Cows produce milk for the same reason that humans do – to feed their babies. However, on dairy farms, calves are separated from their mothers shortly after birth so that the milk nature intended for them can instead be consumed by humans.

It would actually be more natural for any adult still drinking milk to drink human breast milk – if that thought turns your stomach, so should the thought of drinking cows' milk.

It helps prevent heart disease

Tomatoes (JACK GUEZ/AFP/Getty Images)

Eating foods loaded with animal fats is literally killing us. Coronary heart disease, which is linked to a meat-based diet, is the leading cause of death in the UK. On average, 224 people die of heart disease in this country each day.

The good news is that we can help prevent the majority of cardiovascular diseases simply by adopting a plant-based diet.

Animal agriculture is killing the planet

Cows are seen at a new dairy farm (OLGA MALTSEVA/AFP/Getty Images)

Forget energy-efficient light bulbs or hybrid cars – the best thing we can do to help the environment is to stop eating animal flesh. Meat production is a leading cause of climate change, water depletion, soil erosion and most other environmental problems, according to United Nations scientists.

10 best vegan foods Show all 10 1 /10 10 best vegan foods 10 best vegan foods Provamel Organic Almond Original This almond drink is a milk alternative that works for your coffee, muesli or baking. Although it won’t froth up as well as the regular white stuff, it makes up for its textural shortcomings with a delicious nutty taste. £2.59, goodnessdirect.co.uk 10 best vegan foods Marigold Engevita Nutritional Yeast Flakes Going vegan means there are vitamins, especially B12, normally found in meat, that you’ll have to get from elsewhere. Put this in anything from stews to salads to add a cheesy, nutty flavour to your cooking. £2.80, ocado.com 10 best vegan foods Bute Island Foods garlic & herb Creamy sheese Bute Island Foods makes a range of dairy-free “sheeses”. Ignore the silly name, they are a good substitute for the real thing, particularly this spreadable alternative. With a creamy texture and a rich, garlicky flavour it goes very well on a piece of toast. £2.48, goodnessdirect.co.uk 10 best vegan foods Clif Chocolate Almond Fudge Bar Active types will like this rich, sweet treat made from oats, rice syrup, soybeans and almond purée, among other goodies. It tops up energy levels fast, making it ideal for runners, cyclists or hikers. A delicious chocolaty vegan-alternative to a brownie. £1.25, thehealthbay.com 10 best vegan foods Macsween Vegetarian Haggis Just because you’re meat- and dairy-free doesn’t mean you have to opt out of Sunday roasts. This family-run business, famous for its traditional haggis, also makes a vegan/vegetarian alternative. It’s surprisingly rich in flavour, with the mushrooms, lentils and oatmeal providing a good chunky texture. And it’s lighter than the meaty alternative. £3.55, waitrose.com 10 best vegan foods Soulful Food OnePot Butternut, Lentil & Spinach hotpot This low-fat, tasty hotpot is ideal if you need something quick and easy for dinner. With hints of Indian spices, and chunks of cauliflower and butternut squash, it’s good as it is, or you can beef it up with some extra veggies. £3.49, ocado.com 10 best vegan foods Pudology Gluten- and Dairy-Free Chocolate Puds It’s hard to believe this rich chocolate pudding is completely dairy-free. Made with coconut milk chocolate ganache and Madagascan vanilla, it is our favourite from the Pudology range, which also features banoffee and strawberry desserts if chocolate’s not your thing. £2.76 (2 x 85g), ocado.com 10 best vegan foods Yu! Jus Fruit Blueberry Pieces Sweet treats can be healthy. These bite-size blueberry pieces are free from added sugar, and with a similar texture to wine gums, kids will be fooled into thinking they’re the real deal. 67p, tesco.com 10 best vegan foods Rude Health Spelt Oaty This small company prides itself on using natural ingredients that aren’t over-processed. Its high-fibre biscuits made from Scottish oatmeal, spelt flour and extra-virgin olive oil are a tasty addition to a packed lunch. £1.99 (4 x 50g), waitrose.com 10 best vegan foods Alara Into the Garden Organic active Muesli This light, crisp breakfast offering made from a mix of amaranth, quinoa, finely chopped seeds and nuts and naturally sweetened with dried apple pieces, is just as tasty as your regular cereal. Try it with almond milk. £4.66, goodnessdirect.co.uk

Eating vegetables and grains directly, instead of funnelling them through animals, also uses far less land and water, which is why the UN has said that a global shift towards a vegan diet is vital to save the world from the worst effects of climate change.

Vegan food is flippin' delicious

Vegan cake (OLGA MALTSEVA/AFP/Getty Images)

Think that going vegan means you'll have to give up hamburgers, chicken sandwiches and ice cream? Think again.

As the demand for vegan food skyrockets, companies are coming out with more and more delicious vegan meat and non-dairy foods which have all the taste of the real stuff but none of the cholesterol or cruelty.

Mimi Bekhechi is the Director of PETA UK