The predominant protein found in premature formula is:

• A. Casein
• B. Soy
• C. Whey
• D. Albumin

Answer: (C)

Whey is the predominant protein in premature formula because it digests more quickly and is more soluble, which suits the immature digestive system of preterm infants. Human milk at birth is also whey-predominant, so formulas for premature babies are designed to mimic that pattern to improve tolerance, digestion, and nitrogen utilization. Whey proteins are readily absorbed and cause less delayed gastric emptying, helping these babies grow and thrive.

In contrast, casein forms firmer curds in the stomach and digests more slowly, which can burden the still-developing gut of a preterm infant. Soy is plant-based and has a different amino acid profile that may not meet the precise needs of preemies, and albumin is a plasma protein not used as the main protein source in standard neonatal formulas.