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Understanding Cholesterol

What cholesterol actually is, how HDL, LDL and triglycerides differ, and why the balance between them matters more than one number.

Written by Omer Suliman · Last reviewed September 2026 · Educational information only

Medipher explains medical wording in plain English — it does not diagnose or replace a clinician. If this is a medical emergency, call your local emergency number immediately.

What this collection covers

  • HDL
  • LDL
  • Triglycerides
  • Total Cholesterol

Your learning pathway

Follow the steps in order, or jump to the part you need. The emphasis is understanding, not diagnosis.

  1. What is cholesterol?A fat the body needs, carried around the blood by different particles.
  2. HDLThe fraction that carries surplus cholesterol back to the liver.
  3. LDLThe fraction that delivers cholesterol out to the tissues.
  4. TriglyceridesA different blood fat, strongly affected by recent food and alcohol.
  5. Understanding cholesterol blood testsHow a lipid profile is reported and why ratios are often used.
  6. Lifestyle factorsDiet, activity, weight, alcohol and smoking — and what they generally influence.
  7. Questions to ask your doctorHow results feed into overall cardiovascular risk conversations.

About this page

Medical reviewer
Clinical review pending
Last reviewed
September 2026

Evidence. Written from public patient-information sources including the NHS, NICE and the Association for Laboratory Medicine, and reviewed for plain-English accuracy before publication.

Educational content only. Medipher explains medical language in plain English. It does not diagnose, and it is not a substitute for advice from a doctor, nurse or pharmacist. Read the medical disclaimer.

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