This podcast episode explores the importance of salt and sodium in the body, emphasizing their roles in electrolyte balance, fluid regulation, nerve function, muscle contractions, reflexes, acid-base balance, and nutrient absorption. The episode introduces the renin-angiotensin-aldosterone system as the main system for regulating salt and discusses its processes, including the production of renin and angiotensinogen, the conversion of angiotensin I to angiotensin II, and the stimulation of aldosterone production. The episode also explores the role of aldosterone in controlling blood pressure and fluid balance, as well as the effects of insulin on sodium reabsorption and blood pressure. It challenges the previous vilification of salt restriction and highlights the complex relationship between salt, insulin, and fat cells. The findings suggest that salt restriction may increase insulin levels and reduce insulin sensitivity, potentially contributing to insulin resistance and metabolic syndrome. The episode raises questions about popular dietary recommendations and emphasizes the critical role of insulin in fat storage.