A 30-something woman in Taiwan was recently found to have total cholesterol above 400 mg/dL—more than double the normal cutoff—despite having a body mass index of just 17. The unexpected culprit, according to cardiologist Dr. Hui-Feng Hong of Shin Kong Hospital, was not genetics but severe chronic undereating.
The woman’s low-density lipoprotein (LDL) cholesterol measured 276 mg/dL, far above the recommended target of under 130 mg/dL. Her triglycerides and HDL cholesterol were normal, and urine tests showed no protein, ruling out nephrotic syndrome. She also had a systolic blood pressure of only 70 mmHg, a resting heart rate of 30 to 40 beats per minute, and had not menstruated for four to five years.
A Key Clue in the Achilles Tendon
Dr. Hong noticed that the woman’s Achilles tendon was unusually thin. In familial hypercholesterolemia, a genetic disorder that causes severely high cholesterol, this tendon typically becomes thick and lumpy due to cholesterol deposits. The thin tendon made a hereditary cause unlikely, so Dr. Hong referred her to an endocrinologist for further evaluation.
That referral uncovered the real problem: the woman was eating only about 500 calories per day, mainly fish and rice porridge. This extreme energy deficit triggered a condition doctors call “starvation hypercholesterolemia.” Her thyroid hormone T3 was also low, further slowing her metabolism and impairing cholesterol clearance.
Why Going Hungry Can Raise Cholesterol
Chronic under-eating does more than cause weight loss. It can slow the heart rate, lower blood pressure, stop menstruation, and lead to fluid retention. It also disrupts the liver’s ability to remove LDL cholesterol from the bloodstream. When the body senses prolonged starvation, it shifts how it processes fat, sometimes driving cholesterol levels upward even in people who look thin.
Key Numbers at a Glance
- Total cholesterol: 400+ mg/dL (healthy: below 200)
- LDL cholesterol: 276 mg/dL (healthy: below 130)
- Body mass index: 17 (healthy: 18.5–24.9)
Recovery Takes Time and Patience
Treating starvation-induced high cholesterol is delicate. Refed too quickly, a severely malnourished person can experience dangerous shifts in fluids and electrolytes, leading to heart rhythm problems or even sudden death. For this reason, the woman was instructed to increase her caloric intake gradually.
Within three weeks of following the plan, her LDL cholesterol dropped by 100 mg/dL. Her blood pressure and heart rate also returned to normal.
This case is a powerful reminder that high cholesterol is not always a disease of excess. Being underweight or eating very little does not automatically protect against metabolic problems. In fact, extreme calorie restriction can backfire in surprising ways. Dr. Hong’s advice to patients and doctors alike is clear: unexplained high cholesterol—especially in a thin person—should prompt a careful look at nutritional history, not just a prescription for statins. For anyone considering a very low-calorie diet, medical supervision is not optional; it could be life-saving.