Milly Gaines
High cholesterol is a common condition, and while it can be caused by lifestyle factors such as diet and exercise, it can also be inherited. Familial hypercholesterolemia (FH) is an inherited condition that affects about one in 250 people, causing high levels of low-density lipoprotein (LDL) cholesterol in the blood from birth. FH is caused by a mutation in one of several genes, which affects the way the body processes cholesterol. This results in a higher risk of heart disease and early heart attacks. FH can be treated with medications, lifestyle changes, and a healthy diet. Early detection is crucial, as it can significantly impact a person's cardiovascular health. If you have a family history of high cholesterol or early heart problems, it is important to get tested and make the necessary lifestyle changes to reduce your risk.
| Characteristics | Values |
|---|---|
| Is cholesterol inherited? | Yes, high cholesterol can be inherited. This condition is called familial hypercholesterolemia (FH). |
| How common is FH? | About 1 in 250 people have FH, which equates to about 5% of the population. |
| What are the symptoms of FH? | FH is characterised by higher than normal levels of low-density lipoprotein (LDL) cholesterol, also known as "bad" cholesterol. There may be no symptoms, but some signs include lumps and bumps around the knuckles or Achilles tendon, yellow cholesterol build-up around the eyes and eyelids, and a pale or white/gray ring around the iris of the eye (corneal arcus). |
| How is FH treated? | FH can be treated with cholesterol-lowering medications such as statins, ezetimibe, and PCSK9 inhibitors. Lifestyle changes, including a healthy diet low in saturated fat and regular exercise, are also recommended. |
| How is FH inherited? | FH is caused by a mutation in one of several genes, most commonly the LDLR gene on chromosome 19. It can be inherited from one or both parents. If a person inherits FH from one parent, they have a 50% chance of passing it on to their children. If they inherit it from both parents, their children will definitely have FH. |
| How does FH increase the risk of heart disease? | LDL cholesterol can build up in the walls of arteries, making them hard and narrow, which increases the risk of heart attack or stroke at an early age. |
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What You'll Learn
Familial hypercholesterolemia (FH) is an inherited condition
People with FH have a defect in how the body recycles low-density lipoprotein (LDL) cholesterol, also known as "bad" cholesterol. This leads to high levels of LDL cholesterol in the blood, which can build up in the walls of arteries, making them hard and narrow. This buildup is called atherosclerosis and can lead to xanthomas, which are fatty deposits that form lumps under the skin. These lumps are particularly noticeable around tendons in the hands, knees, Achilles tendons, and elbows. FH can also cause xanthelasmas, which are yellow cholesterol deposits around the eyelids, and corneal arcus, a white or gray ring around the iris of the eye.
The risk of FH is higher if one or both parents have the gene alteration that causes it. Most people with FH have a mutation or variant in one of three genes: LDLR, APOB, or PCSK9. These genes affect how the body regulates and removes cholesterol from the blood. If a person inherits the FH trait from one parent, there is a 50% chance they will pass it on to their children. If they inherit it from both parents, their children will definitely have FH.
Early detection of high cholesterol levels is key to getting treatment and lowering the risk of cardiovascular disease. Treatments for FH include medications such as statin drugs, which block the production of cholesterol in the liver, and lifestyle changes such as a healthy diet and regular exercise.
FH affects about one in 250 adults and is commonly underdiagnosed and undertreated. However, people with FH have an excellent prognosis if the condition is identified early and treated.
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FH affects the body's ability to process cholesterol
High cholesterol is often associated with old age, but people under the age of 55 can also be affected, especially if they were born with high cholesterol due to familial hypercholesterolemia (FH). FH is a genetic disorder that affects the body's ability to process cholesterol, specifically low-density lipoprotein (LDL) cholesterol, also known as "'bad'" cholesterol. It is caused by a mutation or variant in one of three genes that provide instructions for the body to produce proteins involved in clearing LDL cholesterol from the bloodstream. If one of these genes is faulty, the body does not receive the correct instructions, resulting in high LDL cholesterol levels.
People with FH have a higher risk of heart disease and are more likely to experience a heart attack at a young age. This is because the high levels of LDL cholesterol can build up in the walls of the arteries, causing them to harden and narrow, which can lead to a blockage. The risk of FH is higher if one or both parents have the gene alteration that causes it. If a person inherits FH from one parent, there is a 50% chance that they will pass it on to their children. If they inherit FH from both parents, their children will definitely have FH.
The classic signs of FH include lumps and bumps around the knuckles or Achilles tendon, yellow cholesterol buildup around the eyes and eyelids, and a pale or white/gray ring around the iris of the eye (corneal arcus). However, these signs may only appear after a person has had FH for a long time, and some people never exhibit any signs. That is why it is important to get tested, especially if there is a family history of early cardiovascular problems or high cholesterol. Early detection of high cholesterol levels is key to getting treatment that can lower the risk of cardiovascular disease.
Treatment for FH aims to lower LDL cholesterol levels and typically involves statin drug therapy, which blocks an enzyme that produces cholesterol in the liver and increases the body's ability to remove cholesterol from the blood. Other treatment options include medications that block cholesterol absorption in the intestines or drugs that block the PCSK9 enzyme, reducing LDL cholesterol levels. In severe cases of FH, LDL apheresis may be used, where the blood is run through a machine that removes bad cholesterol before returning the "cleaned" blood to the body.
While FH is a genetic condition, lifestyle factors can also contribute to high cholesterol levels. A less-than-ideal diet, lack of exercise, and smoking can all increase the risk of high cholesterol. Therefore, it is recommended to maintain a healthy lifestyle by eating a balanced diet low in saturated fat, staying active, and avoiding smoking.
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FH is caused by a gene alteration
Familial hypercholesterolemia (FH) is a genetic disorder that increases your risk of heart disease at a younger age than usual. It is caused by a gene alteration that's passed down from one or both parents. People who have this condition are born with it, and it affects about one in 250 adults. FH is an inherited defect in how the body recycles LDL cholesterol. This means that people with FH have a higher risk of heart disease and a greater risk of early heart attack.
The genetic changes that cause FH are passed down from one or both biological parents. In most cases, a specific protein (LDL receptor) that removes LDL from the blood doesn't work properly or there isn't enough of it. This results in a buildup of LDL cholesterol in the blood, which can lead to blockages in the arteries and increase the risk of heart disease. If left untreated, people with FH may develop heart disease as early as their 30s or even earlier in rare cases.
There are two types of FH, depending on whether one or both parents pass on the genetic variant: Heterozygous FH (HeFH) and Homozygous FH (HoFH). HeFH is the more common type, occurring in about one in 200 to 500 people worldwide. HoFH is much rarer, affecting approximately one in 160,000 to one million people globally. If you inherit FH from one parent, there is a 50% chance that you will pass it on to your children. If you inherit it from both parents, your children will definitely have FH.
The risk of FH is higher if one or both parents have the gene alteration. Most people with FH receive one affected gene, but in rare cases, a child can inherit the affected gene from both parents, resulting in a more severe form of the condition. Early detection of high cholesterol levels is crucial for people with FH to access treatment that can lower their risk of cardiovascular disease. Treatments include cholesterol-lowering medications and healthy lifestyle changes, such as diet and exercise, which can significantly reduce the chances of developing heart disease.
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FH increases the risk of heart disease
High cholesterol is influenced by both genetic and lifestyle factors. Familial hypercholesterolemia (FH) is a genetic condition that affects about one in 250 adults. FH makes it harder for the body to remove low-density lipoprotein (LDL) cholesterol from the blood, causing a buildup of cholesterol along the walls of arteries and veins. This buildup increases an individual's risk of heart disease, heart attack, and stroke at a younger age than is typical.
FH is caused by an abnormal gene alteration passed down from one or both parents. If a person inherits FH from one parent, there is a 50% chance that they will pass it on to their children. If a person inherits FH from both parents, their children will definitely have FH. This rare and more severe form of FH causes extremely high cholesterol levels and can lead to heart attacks in childhood.
The risk factors for FH include a family history of early heart disease, coronary artery disease, or heart attacks before the age of 55 in men and 65 in women. Physical signs of FH include lumps or bumps around the knees, knuckles, elbows, and tendons, as well as a whitish-gray ring around the iris of the eye called corneal arcus.
Early detection and treatment of FH are crucial in reducing the risk of heart disease. Treatments include cholesterol-lowering medications such as statins, ezetimibe, and PCSK9 inhibitors, as well as lifestyle changes such as a healthy diet and regular exercise. People with FH should also refrain from smoking to further reduce their risk of heart disease.
In summary, FH is a genetic disorder that increases the risk of heart disease by causing high levels of LDL cholesterol in the blood. Early diagnosis and treatment are essential for managing FH and lowering the risk of cardiovascular events.
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FH can be treated with medication and lifestyle changes
Familial hypercholesterolemia (FH) is a genetic condition that affects about one in 250 adults. It is caused by a gene alteration that's passed down from one or both parents. FH affects the way the body processes cholesterol, making it harder for the body to remove low-density lipoprotein (LDL) cholesterol from the blood. This results in a buildup of cholesterol along the walls of arteries and veins, increasing the risk of heart disease, heart attack, and stroke at a very early age.
While FH is a genetic condition, lifestyle changes and medication can play a crucial role in treating FH and lowering the risk of cardiovascular disease. Early detection of high cholesterol levels is key to successful treatment. Here are some ways FH can be treated with medication and lifestyle changes:
Medication
The most common treatment for FH is statin drug therapy. Statins work by blocking an enzyme that produces cholesterol in the liver and increasing the body's ability to remove cholesterol from the blood. They have been safely used to reduce the risk of heart disease and can lower LDL cholesterol levels by 50% or more. Other treatment options include:
- Medications that block cholesterol absorption from the intestines into the bloodstream.
- Drugs that block the PCSK9 enzyme, reducing LDL cholesterol levels.
- Lipoprotein apheresis, a nonsurgical therapy that filters the blood to remove LDL cholesterol, is used in severe cases of FH.
Lifestyle Changes
While lifestyle changes alone may not be sufficient to treat FH, they are crucial for overall health and can complement medication. Recommended lifestyle changes include:
- A healthy diet: A low-fat diet that severely limits saturated fats, trans fats, and cholesterol.
- Regular exercise: Aerobic exercises performed for at least 30 minutes, four or more days a week, can improve blood lipid levels.
- Weight loss: Achieving and maintaining a desirable weight can improve lipid parameters.
- Smoking cessation: Quitting smoking is essential for lowering cardiovascular risk.
By combining medication and lifestyle changes, individuals with FH can effectively manage their condition, lower their cholesterol levels, and reduce the risk of associated health complications.
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Frequently asked questions
Cholesterol is an essential component of cell membranes and is needed for many bodily functions, such as hormone production. It is produced when foods containing oil and fat are digested and in the liver.
FH is an inherited disorder that makes it harder for the body to remove low-density lipoprotein (LDL) cholesterol from the blood. This causes a build-up of cholesterol along the walls of arteries and veins, increasing the risk of heart disease, heart attack, and stroke at a young age. FH affects about 1 in 250 people.
FH is treated with cholesterol-lowering medications, such as statins, and healthy lifestyle behaviours, including a balanced diet low in saturated fat, regular exercise, and not smoking.
FH is often diagnosed through gene tests, especially if you have a family history of high cholesterol or early heart disease. Signs of FH include lumps and bumps around the knuckles, elbows, knees, Achilles tendon, and eyelids, as well as a ring around the iris of the eye.
While FH is a genetic condition, high cholesterol in general can be influenced by diet, lack of exercise, and aging. A diet high in saturated fats, for example, can contribute to high cholesterol levels.
