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What is Cholesterol in the Human Body?


What is Cholesterol in the Human Body?

Cholesterol often gets a bad reputation, but in reality, it is an essential substance for our bodies. Let’s understand Cholesterol meaning. It is a type of lipid compound, and is vital for building cells, producing hormones, and creating vitamin D. While the liver produces all the cholesterol in the human body, we also get cholesterol from the foods we eat, particularly animal-based foods.

Even though cholesterol is an essential component of our body, excessive levels of it can pose health risks such as clogged arteries, hyperlipidemia (high cholesterol) or hypertension. Saturated and trans fats found in animal products, such as meat, poultry, and dairy, can cause our liver to produce more cholesterol than necessary, leading to its unhealthy levels. Additionally, certain tropical oils, like palm oil and coconut oil, contain saturated fats that can increase the levels of “bad” cholesterol in our bodies. So, while cholesterol is not all bad, it’s important to keep an eye on our cholesterol levels and make healthy choices when it comes to our diet.

What is the function of cholesterol?

Blood cholesterol is an essential component of the human body, serving several crucial functions that are necessary for our health and well-being.

  • Helps build cell membranes: Cholesterol is a key component of cell membranes, which are the protective outer layer of cells.
  • Helps produce hormones: Cholesterol is a precursor to the production of various hormones, including testosterone and estrogen.
  • Helps produce bile acids: Cholesterol is needed to produce bile acids, which aid in the digestion and absorption of fats in the small intestine.
  • Helps produce vitamin D: Cholesterol is also needed to produce vitamin D, which is important for bone health and immune function.
  • Helps maintain the integrity of the skin barrier: Cholesterol is a key component of the stratum corneum, the outermost layer of the skin that acts as a barrier to prevent water loss and protect against environmental damage.

Types of Cholesterol in the Human Body and How They Work

Cholesterol is an important component of the human body, serving various functions such as hormone production, digestion of fats, and formation of cell membranes. However, not all types of cholesterol are equal. That’s why understanding the different types of cholesterol in the human body and how they work is crucial for maintaining good health.

  • Low-density lipoprotein (LDL) cholesterol, also known as “bad” cholesterol, can contribute to the buildup of plaque in the walls of arteries. Over time, this buildup can narrow the arteries, restricting blood flow and increasing the risk of heart disease.
  • High-density lipoprotein (HDL) cholesterol, or “good” cholesterol, in contrast, helps remove excess cholesterol from the bloodstream and carries it back to the liver for processing.
  • Another type of blood lipid that can affect cholesterol levels is High levels of triglycerides in the bloodstream can contribute to the formation of plaque and increase the risk of heart disease such as high blood pressure, especially when combined with low levels of HDL cholesterol.

Understanding different types of cholesterol and how they work is essential for maintaining good health and preventing heart attacks along with the risk of related conditions. Lifestyle changes, such as a healthy diet and regular exercise, can help manage cholesterol levels. In some cases, medications may be necessary to lower cholesterol levels.

What do blood cholesterol numbers mean?

Blood cholesterol numbers are an essential indicator of cardiovascular health. Understanding the meaning of these numbers is critical in determining the level of risk for heart disease and stroke.

Blood cholesterol levels are measured in milligrams per deciliter (mg/dL) and are typically obtained through a simple blood test. Total cholesterol levels of 200 mg/dL or lower are considered desirable, while levels between 200-239 mg/dL are borderline high, and levels above 240 mg/dL are considered high.

High-density lipoprotein (HDL) cholesterol, also known as “good” cholesterol, should be above 60 mg/dL. Low-density lipoprotein (LDL) cholesterol, also known as “bad” cholesterol, should be below 100 mg/dL for those at low risk of heart disease, and below 70 mg/dL for those at high risk. Triglyceride levels should be below 150 mg/dL.

It’s important to note that blood cholesterol numbers alone do not provide a complete picture of cardiovascular health. Other factors, such as blood pressure, smoking, family history, and age, can also contribute to the risk of heart disease and high blood pressure. For example, there is a connection between sodium and BP levels. High sodium intake can contribute to high blood pressure, which is a significant risk factor for heart disease and stroke.

Blood pressure monitoring is an important aspect of cardiovascular health. Elevated blood pressure, or hypertension, can cause damage to blood vessels. A blood pressure reading consists of two numbers: systolic and diastolic. Systolic blood pressure, the top number, measures the pressure in the arteries when the heart beats. Diastolic blood pressure, the bottom number, measures the pressure in the arteries when the heart rests between beats. A normal blood pressure reading is around 120/80 mmHg.

What is a healthy blood cholesterol level?

A healthy blood cholesterol level is important for good cardiovascular health. The American Heart Association recommends that total cholesterol should be less than 200 mg/dL, LDL cholesterol should be less than 100 mg/dL, and HDL cholesterol should be 60 mg/dL or higher. Triglycerides should be less than 150 mg/dL. However, cholesterol targets may vary based on individual risk factors.

To reduce high blood pressure, a low-sodium diet is often recommended. Low-sodium diet foods include:

  • fresh fruits and vegetables
  • lean proteins
  • whole grains
  • low-fat dairy products

Foods high in sodium, such as processed and packaged foods, should be limited to help improve cardiovascular health.


To take control of your cholesterol levels and improve your cardiovascular health, it is crucial to seek guidance from a qualified healthcare provider. You can find a physician in your area who can help you create a personalized plan for managing your cholesterol levels, visit our Find a Physician webpage. Don’t wait any longer to prioritize your health – take action today!

FAQs on Blood Cholesterol

1)What is the normal level of cholesterol?

The normal level of cholesterol is typically less than 200 milligrams per deciliter (mg/dL) of blood. However, it is important to note that the optimal level of cholesterol may vary depending on an individual’s age, gender, and overall health.

2) What food is bad for cholesterol?

Foods that are high in saturated and trans fats are typically considered bad for cholesterol as they can raise LDL (bad) cholesterol levels. These foods include fatty meats, fried foods, full-fat dairy products, and baked goods containing partially hydrogenated oils. It is important to limit the intake of these foods and incorporate more heart-healthy options such as fruits, vegetables, whole grains, and lean proteins into your diet.

3) How can I check my cholesterol at home?

You can check your cholesterol at home by using a cholesterol home testing kit. These kits typically use a small blood sample obtained from a finger prick to measure your total cholesterol, HDL (good) cholesterol, and LDL (bad) cholesterol levels. However, it is important to note that home testing kits may not be as accurate as a test performed by a healthcare professional.

4) Can fasting cure high cholesterol?

While fasting has potential health benefits such as weight loss and improved insulin sensitivity, there is no evidence to suggest that fasting can cure high cholesterol. Extreme fasting or crash diets may have negative effects on blood cholesterol levels by causing a reduction in HDL (good) cholesterol levels.

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