Challenge 22 is a program created and run by Animals Now, an NGO based in Israel. It is designed to encourage individuals to try a vegan lifestyle for 22 days through an online platform that provides guidance, support, and resources. The program features daily challenges, tips, videos, and plant-based recipes to motivate participants. Challenge 22 emphasizes the potential benefits of a vegan diet for animals, the planet, and personal health. The initiative has attracted over 900,000 participants worldwide and offers access to mentors and registered dietitians who specialize in vegan nutrition. Challenge 22 is free and provides a friendly and supportive environment for those interested in exploring veganism.