Unfortunately, due to the highly restrictive nature of the diet, vegans are at risk of being deficient in certain nutrients such as calcium and vitamin B12 usually found in dairy and meat respectively.

One of the primary reasons people quit veganism is health concerns. While veganism can be a healthy and sustainable diet when done correctly. Some individuals may experience inadequate nutrition and deficiencies due to a lack of knowledge about plant-based sources of essential nutrients.

Level 5 vegan Level 5 vegans also avoid all animal-derived products such as eggs, dairy products, meats, fish and seafood, and will also avoid any food products where accidental traces of animal products may feature. They will also avoid leather, gelatin, and some food colourings.

Each individual person who goes vegan can save 200 animals per year, 1.3 million gallons of water, and 1.5 tons of carbon emissions, and the UN reports that a vegan diet can feed many more people than an animal-based diet.