One of the earliest followers of what we now consider a vegan diet was Arab philosopher and poet Al-Maʿarri who abstained from animal products for his health and beliefs on the transmigration of souls and animal welfare.

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.

Preventing the exploitation of animals is not the only reason for becoming vegan, but for many it remains the key factor in their decision to go vegan and stay vegan. Having emotional attachments with animals may form part of that reason, while many believe that all sentient creatures have a right to life and freedom.