Jasmine from Bake Off is bald because she has alopecia, an autoimmune condition that causes hair loss. She started losing her hair around the age of 12 and decided to embrace her baldness rather than wear wigs. Jasmine has been open about her alopecia journey and mentioned that she is beginning to enjoy not having hair and being different. This condition was the likely reason she shaved her head and has been bald during the competition.