Question

Hypertriglyceridemia is NOT caused by

• A. Diabetes mellitus
• B. Obesity
• C. Alcohol
• D. Cigarette smoking

Hint:

Three of these are textbook causes of high triglycerides; one is better known for a different lipid effect.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
The question asks which of the four listed factors is NOT a recognised cause of secondary hypertriglyceridemia, testing knowledge of common causes of raised triglycerides outside of primary genetic lipid disorders.

Step 2: Key Concept or Approach:
Secondary hypertriglyceridemia results from conditions or exposures that either increase hepatic triglyceride production or impair its clearance. The classic list of secondary causes includes poorly controlled diabetes mellitus, obesity, excess alcohol intake, hypothyroidism, chronic kidney disease, and certain drugs — cigarette smoking is not traditionally grouped with these.

Step 3: Working Through the Options:
Diabetes mellitus, especially when poorly controlled, causes increased hepatic VLDL production and reduced lipoprotein lipase activity, both of which raise triglycerides, so it is a genuine cause. Obesity is strongly linked to insulin resistance, which similarly drives up VLDL synthesis and triglyceride levels. Alcohol is metabolised in the liver in a way that increases fatty acid synthesis and VLDL output, making it a well-known cause of hypertriglyceridemia, sometimes dramatically so. Cigarette smoking's best-established lipid effect is lowering HDL cholesterol and promoting endothelial dysfunction and oxidative modification of LDL; it is not classically listed as a cause of elevated triglycerides in the way diabetes, obesity, and alcohol are.

Step 4: Conclusion:
Cigarette smoking is the option NOT classically associated with causing hypertriglyceridemia, making it the correct answer.