Yes, it is possible to be 100% vegan. This means abstaining from all animal products, including meat, poultry, fish, dairy, eggs, and honey. It also means avoiding animal-derived ingredients in food and consumer products, such as sugar, gelatin, and some forms of vitamin D3. While a 100% vegan diet is possible, it can be challenging to maintain over the long term. Some vegans find it helpful to relax their rules occasionally or to focus on reducing rather than eliminating their consumption of animal products.