It could go Lord of the Flies... fat ones go first

When the Soviet writer Solzhenitsyn was in the gulag, he used to sew bread rations into his mattress, so that if the guards withheld his food, he wouldn’t die.
My sister helpfully reminds me of this as I head off for a week-long juice cleanse, offering to pop a sewing kit in my bag. But there is no bread — nothing chewier than juice, broth, herbal tea — on a juice cleanse. If she were here now, five days in, I’d most likely eat her. As each day passes, the potted plant in my room becomes more nervous.