Cholesterol 68 mg/dL

What 68 mg/dL means

A total cholesterol of 68 mg/dL is markedly low — well below what labs typically see in adults, and low enough that finding the reason matters more than the number itself.

Guidelines define "too high" for cholesterol, not "too low," and the level itself does not damage anything acutely — but a total below about 80 mg/dL almost always has a driver worth identifying. The most benign one is intensive cholesterol-lowering treatment: a statin combined with ezetimibe or a PCSK9 inhibitor can legitimately bring totals this low, and that is generally considered safe under your prescriber's supervision. Outside of treatment, levels this low often accompany something significant: advanced liver disease (the liver makes most of your cholesterol), severe malnutrition or an absorption problem, an overactive thyroid, a serious ongoing infection or critical illness, some cancers, or a rare inherited disorder of fat transport. Because several of those need timely attention, an unexplained result in this range should be evaluated promptly rather than filed away. If your lab reported a value even below 45 mg/dL, the same prompt work-up applies.

The high-side cutoffs (desirable below 200 mg/dL, borderline high 200–239, high 240 and above) follow the US National Cholesterol Education Program (ATP III) categories most American labs print, and are the same for men and women. No US guideline defines an official "too low" line for total cholesterol, so the low-end boundaries here (low below 120 mg/dL, markedly low below 80 mg/dL) follow common clinical usage rather than a formal cutoff. This scale runs from 45 to 600 mg/dL; the rare results outside it call for the same response as the nearest extreme band.

Common causes

• Intensive cholesterol-lowering therapy (statin plus ezetimibe or a PCSK9 inhibitor)
• Advanced liver disease or liver failure, which cuts cholesterol production
• Severe malnutrition, anorexia, or cancer-related weight loss
• Malabsorption conditions (celiac disease, pancreatic insufficiency, short bowel, bariatric surgery)
• Severe overactive thyroid (hyperthyroidism)
• Critical illness — sepsis, major surgery, severe burns, or trauma can drop cholesterol sharply for weeks
• Rare inherited disorders (abetalipoproteinemia, homozygous familial hypobetalipoproteinemia)
• Bone marrow and severe chronic diseases that suppress cholesterol production

Symptoms that can go with it

• Often none from the cholesterol level itself
• Unintended weight loss, poor appetite, or fatigue (with an underlying illness)
• Yellowing of the skin or eyes, swelling, or easy bruising (with liver disease)
• Greasy, pale, hard-to-flush stools or chronic diarrhea (with absorption problems)
• Night-vision trouble, balance problems, or numbness (rare inherited disorders, from fat-soluble vitamin deficiency)

Sensible next steps

1. If you take a statin plus ezetimibe or a PCSK9 inhibitor, this can be an expected treatment effect — do not stop the medication on your own, but make sure your prescriber has seen this result
2. If you are not on cholesterol-lowering medication, contact your clinician promptly — aim for days, not months — because unexplained levels this low deserve a work-up
3. Expect checks of liver function, thyroid, blood count, and nutrition status alongside a full lipid panel
4. Tell your clinician about weight loss, appetite changes, diarrhea, alcohol use, or any recent serious illness or surgery, which help pinpoint the cause
5. Seek care right away if you notice yellowing skin or eyes, confusion, or rapid unexplained weight loss