Weight fluctuates wildly but analyze: is sodium causing water retention? Map my sodium intake: processed foods, restaurant meals, added salt. Calculate: what's the water retention from high sodium? Show me the sodium-weight connection: this much sodium = this much water weight. Give me the sodium reduction: cut to this level, expect this water drop. Include: whether scale fluctuations are water not fat, how much sodium I'm actually consuming, and if low-sodium period would reveal true fat loss.