Source / episode info

• **Episode:**650
• **Title:**DIP Ep 650: The Clutch Nutrition Podcast (For Step 1-3)
• **Published:**2026-04-27
• Source:Episode page

One-liner

This episode provides a comprehensive review of high-yield nutritional concepts for the USMLE, covering specific vitamin/mineral deficiencies, dietary guidelines (DASH, Mediterranean), drug interactions (PPIs, diuretics), and critical care management like Refeeding Syndrome.

High-yield summary

• Vitamin Deficiencies: Must memorize classic signs: Vitamin A -> Night blindness/Xeroftthalmia; B1 -> Wernicke-Korsakoff (Heart/Neuro); B3 -> Pellagra (Dermatitis, Diarrhea, Dementia); C -> Scurvy; K -> Coagulopathy (Elevated PT/INR).
• Mineral Deficiencies: Iron deficiency causes microcytic anemia and Pica. Zinc deficiency leads to poor wound healing and alopecia. Hypomagnesemia is critical as it can cause arrhythmias (Torsades de Pointes) and secondary hypocalcemia/hypokalemia.
• Drug Interactions: PPIs impair B12, Mg, and Ca absorption by reducing gastric acidity. Isoniazid (INH) requires pyridoxine (Vitamin B6) supplementation to prevent peripheral neuropathy. Loop diuretics cause volume depletion leading to K+ loss.
• Critical Care/GI: Refeeding Syndrome is a life-threatening complication of refeeding after starvation, with the most common cause of death being hypophosphatemia. TPN should only be used when the GI tract is non-functional (e.g., high-output fistula).
• Assessment Tools: Always assess patients using "Nutrition Vital Signs" and understand the difference between Food Insecurity (lack of enough food) and Nutrition Insecurity (lack of nutritious food).

Learning objectives

• Differentiate the clinical manifestations of various vitamin and mineral deficiencies (A, B1, B3, C, K, Fe, Zn).
• Identify high-risk patient populations for nutritional deficits (e.g., alcoholics, GI surgery patients, CKD patients).
• Recognize and manage acute metabolic crises such as Refeeding Syndrome and hypomagnesemia.
• Understand the pathophysiology of drug-nutrient interactions involving PPIs, diuretics, and anti-tuberculosis drugs.
• Apply principles of nutritional assessment, including distinguishing between food allergy and food intolerance.

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