HDL Cholesterol · low result
Low HDL cholesterol: what it means, causes and what to check next
Short answer
Low HDL cholesterol — below 40 mg/dL in men or 50 in women — is one of the most reliable markers of insulin resistance: it travels with high triglycerides, excess weight around the middle, high blood sugar, inactivity and smoking. It raises cardiovascular risk as a marker more than as a cause, which is why no drug that raised HDL has prevented heart attacks and why the work-up looks past the HDL to triglycerides, glucose, ApoB and the habits underneath. Rare inherited forms exist when HDL is very low in a lean, fit person.
Medically reviewed by Youmna DiStefano, MD · Last reviewed November 2026
What is the normal range for HDL Cholesterol?
- Male, age 18+: 40 – 100 mg/dL
- Female, age 18+: 50 – 100 mg/dL
Low HDL is associated with higher cardiovascular risk. Exercise, dietary fat quality, and smoking all influence HDL.
Full reference table, citations and testing options: HDL Cholesterol biomarker page.
What are the common causes of low HDL Cholesterol?
- Insulin resistance and metabolic syndrome — the most common cause by far; HDL falls as triglycerides rise, with waist size, prediabetes and type 2 diabetes
- Smoking (lowers HDL by about 5–10%), physical inactivity and excess weight
- A very low-fat, high-refined-carbohydrate diet, which lowers HDL along with raising triglycerides
- High triglycerides of any cause — the two move inversely because cholesterol is traded out of HDL particles
- Medications — anabolic steroids and testosterone (markedly), progestins in some contraceptives, beta-blockers and thiazides (modestly), isotretinoin
- Acute illness, infection, surgery and inflammation — HDL falls transiently for weeks; chronic inflammatory disease and chronic kidney disease lower it persistently
- Inherited disorders — familial hypoalphalipoproteinemia (ApoA-I variants), LCAT deficiency, Tangier disease (HDL near zero with enlarged orange tonsils and neuropathy); suspected when HDL is below about 20 mg/dL in a lean, active person
- Men run lower than women; South Asian and Hispanic ancestry run lower on average
What symptoms go with low HDL Cholesterol?
- None — low HDL is found on a lipid panel
- The company it keeps: a large waist, high blood pressure, high triglycerides and high glucose (metabolic syndrome)
- Corneal clouding, enlarged orange tonsils, neuropathy or kidney disease in the rare genetic forms
What do clinicians usually check next?
- Repeat fasting if the sample was non-fasting or drawn during an illness — HDL drifts down for weeks after infection or surgery
- Read it with the triglycerides, glucose or A1c and waist circumference: low HDL with triglycerides above 150 and a raised glucose is metabolic syndrome, and that is the diagnosis to act on
- Apolipoprotein B or non-HDL cholesterol — the atherogenic particle count is what treatment targets; raising HDL itself is not a goal (niacin and CETP inhibitors raised it without preventing events)
- A 10-year cardiovascular risk estimate; low HDL raises the calculated risk and may tip a statin decision
- Exercise (150+ minutes a week), weight loss, stopping smoking, replacing refined carbohydrate with unsaturated fat and moderate alcohol limits raise HDL 5–15% and, more importantly, improve the whole picture
- Very low HDL (below about 20 mg/dL) in someone lean and fit, or with eye, tonsil or nerve findings — ApoA-I level and a lipid-genetics referral
Follow-up tests available at TestWell: Colon Cancer Screening Test (FIT) ($59.99), Glucose Test ($14.99).
How do you recheck HDL Cholesterol?
Prices are cash-pay; every order adds one $6 lab processing fee. Physician authorization is included; no insurance or referral needed.
| Test or panel | Type | Price | Fasting | Results |
|---|---|---|---|---|
| General Wellness Panel | Panel · 4 tests | $49.99 | Yes | 1–3 business days |
| Peptide Essentials Panel | Panel · 4 tests | $89.99 | Yes | 1–3 business days |
| Heart Health Panel | Panel · 5 tests | $99.99 | Yes | 3–5 business days |
| Lipid Panel | Test · 4 biomarkers | $19.99 | Yes | 1–3 business days |
Common questions
What causes low HDL cholesterol?
Most often insulin resistance — excess weight around the middle, high triglycerides, prediabetes or type 2 diabetes — together with smoking, inactivity and a diet high in refined carbohydrate. Anabolic steroids, some progestins and beta-blockers lower it, acute illness lowers it for weeks, and rare inherited disorders produce very low levels in lean, fit people.
What HDL level is too low?
Below 40 mg/dL in men and 50 mg/dL in women on the standard lipid-panel cutoffs (1.0 and 1.3 mmol/L). Below about 20 mg/dL in someone lean and active suggests an inherited disorder of HDL metabolism and warrants a specialist look.
How do I raise my HDL?
Regular aerobic exercise, losing excess weight, stopping smoking, swapping refined carbohydrate for unsaturated fats and nuts, and keeping alcohol moderate each raise HDL by a few points. No medication is prescribed to raise HDL any more: drugs that raised it (niacin, CETP inhibitors) did not reduce heart attacks, so treatment aims at LDL and ApoB with the overall risk in mind.
Is low HDL dangerous on its own?
It marks higher cardiovascular risk and is part of the metabolic syndrome, but it is not treated as a target in itself. The actionable numbers around it are triglycerides, glucose or A1c, ApoB or non-HDL cholesterol, blood pressure and smoking status — and the 10-year risk estimate they feed.
Educational content, not a diagnosis. Lab results are one input; a clinician interprets them with your history and exam.