Veganism is the  practice of abstaining from the use of animal products
Oh, yes, I used to be one!
For someone that is a practicer of this, the philosophy is known as a vegan
Yes, now what's the difference between vegan and vegetarian?
Veganism
Veganism is the practice of abstaining from the use of animal products, particularly in diet, and an associated philosophy that rejects the commodity status of animals. A follower of the diet or the philosophy is known as a vegan. Distinctions may be made between several categories of veganism. "Dietary vegans" (also known as strict vegetarians) refrain from consuming animal products, not only meat but also eggs, dairy products and other animal-derived substances. The term "ethical vegan" is often applied to those who
vegetarian/vegan lifestyle in the Church in the UK.
Partial fasting and temporary abstinence.
During Lent some Christian communities, such as Orthodox Christians in the Middle East, undertake partial fasting eating only one light meal per day. For strict Greek Orthodox Christians and Copts, all meals during this 40-day period are prepared without animal products and are essentially vegan. Unlike veganism, however, abstaining from animal products during Lent is intended to be only temporary and not a permanent way of life.
Eastern Orthodox laity traditionally abstains