Why am I so cold while doing Bright Line Eating?

Susan affectionately calls this side effect the “Bright Line Chill,” and it can sometimes stick around. It comes from the combination of lowered metabolism during the weight loss phase and reduced insulation from fat loss. Once on a full maintenance plan, metabolism can rebound and the chill can then subside, but not always. It’s not terrible, but we Bright Line Eaters tend to get cold more easily than most.