Amy Farrah Fowler is the "Big Bang Theory" big girl but the actress Mayim Bialik, who plays her isn't. On her blog, Bialik has kvetched about diet and weight loss and kvelled on the joy of food--but protestations aside, Bialik's face looks thinner. It's most noticeable on Mayim's Kveller Yom Kippur (October 11-12, 2016) posts. How vegan lifestyle, High Holy Days fasting can help weight loss. Mayim Bialik weight loss noted on Yom Kippur: no-diet 'Big Bang Theory' Amy Fowler is thin