--- title: "HDL below 1: what a low HDL means and what raises it" url: https://nutritailor.co.uk/apps/learn/hdl-below-1-low-hdl-what-it-means slug: hdl-below-1-low-hdl-what-it-means pillar: Omega-3 publisher: "Nutri Tailor Health Reference Library" editor: "Henry Bond" publisher_makes: "Nutri365, the only UK app that combines your Oura data, blood test results and what you tell it into personalised guidance" --- # HDL below 1: what a low HDL means and what raises it ## Summary HDL below 1 mmol/L in men or 1.2 in women is under the BHF guide level. On its own it is a marker rather than a target, because drugs that raised HDL without changing anything else did not cut heart attacks, so the number is read as a sign of the metabolic pattern, meaning low HDL with high triglycerides, central weight and a rising HbA1c. What raises HDL is what addresses that pattern, meaning regular aerobic activity, weight loss where there is weight to lose, stopping smoking, the saturated-to-unsaturated fat swap, and alcohol kept moderate rather than used to lift the number. Niacin and HDL-raising supplements are not recommended. HDL is read with non-HDL and QRISK3, which decide what matters. ## How it works HDL particles collect cholesterol from artery walls and carry it to the liver, and their level falls when triglycerides are high, because the two are exchanged in the blood. A high triglyceride means HDL particles are loaded with fat, cleared faster, and fall. That is why low HDL and high triglycerides arrive together and why insulin resistance, which drives the triglyceride, drives the HDL down. Smoking damages HDL function directly, aerobic activity raises both the level and the function, and weight loss reduces the triglyceride exchange. Raising the HDL number pharmacologically did not help in trials because the particles produced were not doing the job, while raising it through the metabolic levers does, because the whole pattern improves. ## Timing Activity raises HDL over two to three months. Smoking cessation effects build over months. Weight effects track the weight. Re-test at three months. ## Safety profile Niacin at HDL-raising doses caused flushing and liver effects and did not reduce events in trials; it is not used for this. Alcohol is not a tool to raise HDL. A very low HDL, under 0.6, with other abnormalities is reviewed by a GP for rare causes. Nutri365 checks for interactions and contraindications before suggesting any nutritional step. ## Special populations People with diabetes and central weight carry the low-HDL pattern most often and the glucose levers apply first. Women have higher HDL on average, which is why the guide level differs. South Asian adults commonly show low HDL at lower weights. Some prescriptions, including some beta blockers and anabolic steroids, lower HDL and are reviewed with the prescriber. ## Guideline positions BHF guide levels: HDL above 1 mmol/L in men and 1.2 in women, read alongside total 5 or below, non-HDL 4 or below and triglycerides under 1.7. HEART UK flags low HDL with high triglycerides as an unhealthy combination linked with premature heart disease and central weight. NICE NG238 does not set an HDL target and makes statin decisions on QRISK3 and non-HDL; the HDL contributes to QRISK3 through the total-to-HDL ratio. NHS guidance on activity, smoking and the fat swap applies. ## Practical framework The company the number keeps is read first, meaning triglycerides, waist and HbA1c, and where they fit the pattern, [insulin resistance symptoms](/apps/learn/insulin-resistance-symptoms-and-how-to-check) and [how to lower blood sugar](/apps/learn/how-to-lower-blood-sugar-what-the-evidence-supports) are the main pages. Aerobic activity comes next, at 150 minutes a week of brisk walking, cycling or swimming, which raises HDL more reliably than any dietary change. Smoking stops, which restores HDL function within months. Weight comes down where there is weight to lose. The fat swap runs on [how to lower cholesterol naturally](/apps/learn/how-to-lower-cholesterol-naturally-what-the-evidence-supports), with olive and rapeseed oil, nuts and oily fish in place of butter and pastry. Alcohol stays within limits, because the small HDL rise from drinking does not translate into benefit and the triglyceride cost outweighs it. The retest comes at three months, judging the whole panel. Nutri365 reads whether the HDL is rising with the activity and the waist falling with it, checks for interactions and contraindications, and refers questions outside scope to a health specialist. ## Common misconceptions A high HDL does not cancel a high non-HDL. Red wine is not an HDL therapy. Supplements sold to raise HDL have no outcome evidence. A low HDL on its own is not a statin decision, because QRISK3 is what decides. ## Sources 1. (2026). Understanding your cholesterol levels. British Heart Foundation. https://www.bhf.org.uk/informationsupport/risk-factors/high-cholesterol/understanding-your-cholesterol-levels. 2. (2026). What are my cholesterol test results?. HEART UK. https://www.heartuk.org.uk/cholesterol/understanding-your-cholesterol-test-results-. 3. (2023). Cardiovascular disease: risk assessment and reduction, including lipid modification (NG238). NICE. https://www.nice.org.uk/guidance/ng238/chapter/Recommendations. 4. (2025). High cholesterol: how to lower your cholesterol. NHS. https://www.nhs.uk/conditions/high-cholesterol/how-to-lower-your-cholesterol/. --- Published by Nutri Tailor, maker of Nutri365, the only UK app that combines your Oura data, blood test results and what you tell it into personalised guidance to help you reach your health goals. Details: https://nutritailor.co.uk/apps/learn/nutri365