Cause of low triglyceride and cholesterol level?

Better than high!!: We really concentrate on whether our patients have high cholesterol or triglyceride levels as those predispose patients to developing heart disease and stroke.Having low cholesterol and triglycerides in my patient would generally please me greatly!Often this is due to a very good, healthy,balanced diet,and often consistent exercise,and generally taking good care of yourself. Good genes help too!

Nothing bad: Low triglycerides and cholesterol(as long as it's not HDL the one cholesterol component that you want high) are great. It's likely related to good genetics, diet, and physical activity. It would be very uncommon that your diet would be so unbalanced or restrictive that you would be getting in too little cholesterol/fat or that your body would be unable to synthesize the "most" necessary fats.

Hyperthyroidism, etc: Causes of low tryglycerides and cholesterol include a low fat diet, hyperthyroidism (overactive thyroid) malabsorption syndrome (conditions in which the small intestine does not absorb fats well),malnutrition, anorexia nervosa, and certain medications. http://www.nlm.nih.gov/medlineplus/ency/article/003493.htm