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Protein building blocks.
Amino acids; denatured in stomach.
Carbohydrate building blocks.
Simple sugars.
Plant vs animal carbs.
Starch (plants), glycogen (animals).
Major lipid types.
Cholesterol, triglycerides, phospholipids.
Triglyceride structure.
Glycerol + 3 fatty acids.
Phospholipid structure.
TG with one FA replaced by phosphate.