Which Fredrickson type is most common?

• A. Type IIa
• B. Type IIb
• C. Type III
• D. Type IV

Answer: (B)

In this classification, lipids are grouped by which lipoproteins are elevated. The most frequent pattern seen in adults is a mixed hyperlipidemia with both LDL and VLDL increased, which corresponds to Type IIb. This combination often arises from metabolic factors like insulin resistance, obesity, and polygenic influences that raise both LDL cholesterol and VLDL production. Because many people present with elevated cholesterol and triglycerides together, this pattern is more common than isolated high LDL (Type IIa), rare dyslipoproteinremnant disorders (Type III), or isolated VLDL elevation (Type IV). So the most common Fredrickson type is Type IIb.