In the standing plasma test, which finding indicates the presence of chylomicrons?

• A. Turbid plasma
• B. Creamy layer on top
• C. Clear plasma
• D. Opaque plasma

Answer: (B)

Chylomicrons are very large, triglyceride-rich lipoproteins that are the least dense in blood. When plasma is left to stand, these particles rise to the surface and form a creamy, white layer. That distinct top layer specifically signals the presence of chylomicrons. If there are no chylomicrons, the plasma may stay uniformly turbid or remain clear, depending on how much lipid is present, but you won’t see that separate creamy surface. So a creamy layer on top is the telltale sign of chylomicrons.