What is the osmolality of a 30 kcal/oz concentrated standard infant formula?

• A. 300 mOsm/kg
• B. 450 mOsm/kg
• C. 600 mOsm/kg
• D. 350 mOsm/kg

Answer: (B)

Osmolality measures how many dissolved particles are in a kilogram of water. When a formula is concentrated to 30 kcal per ounce, more solute is packed into each volume, raising the osmotic load on the gut. For a 30 kcal/oz concentrated standard infant formula, the osmolality is typically around 450 mOsm/kg. This reflects the higher solute concentration compared to standard formulas (which are closer to 300–350 mOsm/kg). Values like 600 would indicate an even more concentrated or different formulation and aren’t typical for standard concentrated products, while 300–350 would be more like non-concentrated formulas. So 450 mOsm/kg best fits a 30 kcal/oz concentrated standard formula.