Homocysteine – Definition, Normal and Abnormal Levels, and Associated Conditions

The proper functioning of our body relies on a series of chemical processes involving various organic compounds. Among the most important and well-known to all are carbohydrates, lipids, fiber, and proteins. These latter ones are composed of different types of amino acids. One of the most important is homocysteine.

Homocysteine is a non-essential amino acid involved in various important body functions. One of the most significant is its contribution to heart and blood vessel health. It is found both in plasma, bound to other proteins, and in free forms. When there is a homocysteine imbalance, various health problems can occur.

In the article below, we will discover what homocysteine means, what its normal and abnormal values are, as well as the conditions that can arise from its imbalances. We will also find answers to various questions related to this amino acid and its importance in the body.

Homocysteine – what it is and its roles in the body

Regarding homocysteine, it’s important to know that it is a non-essential amino acid, meaning we obtain it from various food sources, so it is not secreted by the body. Paradoxically, it is an important indicator of our health status, as it participates in:

• blood vessel and heart health;
• bone formation processes;
• ensuring cognitive and neural functions;
• protein synthesis;
• detoxification;
• tissue repair;
• antioxidant formation;
• dopamine and serotonin metabolism.

To understand the importance of homocysteine, we also need to know how it is produced in the body.

Homocysteine synthesis in the body

Homocysteine is not produced directly by the body, but results from the metabolism of another essential amino acid, methionine. Methionine is then converted into other substances, such as cysteine, through chemical processes involving vitamins B6, B9, and B12. To maintain optimal homocysteine levels in the body, it is recommended to consume foods rich in these vitamins. Furthermore, homocysteine levels can also be regulated by taking dietary supplements.

One of the supplements that can be consumed for an adequate homocysteine intake is Premium Aronia Vitamin B Complex in liquid form. Easy to administer, the product contains all forms of vitamin B and is enriched with vitamin C and aronia. This supplement supports brain, nervous system, immune system, and heart health.

Premium Aronia Vitamin B Complex contains an optimal combination of vitamin B9 (folic acid) and B12 (methylcobalamin), both essential for regulating homocysteine levels in the body. Additionally, the presence of vitamin C helps support the immune system, thus protecting the main vital organs: the heart and the brain.

[cta_produs style=”style_1″ product=”239641″ image=”https://aronia-charlottenburg.com/wp-content/uploads/2024/11/1.-Homocisteina-ce-este-si-rolurile-sale-in-organsim.jpg”]

What happens when the homocysteine balance is disrupted? We can develop several health problems, most of them quite serious.

Homocysteine and the health problems it is associated with

What is homocysteine? It is an amino acid that has several roles in the body. Furthermore, a balance must exist between it and other similar elements for good health. What does this balance mean? Maintaining its values within normal parameters. Any anomaly can lead to severe problems in the body, including:

• cardiovascular diseases such as atherosclerosis, stroke, and heart attack;
• diabetes mellitus;
• neurological and psychiatric conditions such as Alzheimer’s, Parkinson’s, depression, and schizophrenia;
• osteoporosis;
• various types of cancer.

These conditions can occur due to both homocysteine deficiencies and imbalances of the vitamins involved in its metabolism. It is important to remember that high levels of this amino acid can contribute to the development of these diseases. Therefore, when undergoing routine tests, it is advisable to request homocysteine testing, especially if you have passed the age of 50.

Homocysteine determination is recommended in the following situations:

• elderly individuals with a high risk of cardiovascular disease every 3–4 years;
• individuals under 40 years of age diagnosed with cardiovascular conditions;
• individuals suffering from megaloblastic anemia;
• vegetarian individuals, who may have a reduced intake of vitamin B12;
• individuals suffering from peripheral neuropathy;
• women who have had multiple miscarriages.

Therefore, both women and men should undergo homocysteine determination tests based on their medical history.

Homocysteine and its values

Where is homocysteine found? Homocysteine is found in plasma. Therefore, its determination can only be done through blood tests. These will indicate whether it has normal or abnormal values.

Elevated homocysteine levels can indicate conditions in both women and men, as well as deficiencies in B complex vitamins. Homocysteine testing is particularly important during pregnancy, as abnormal levels can lead to complications such as preeclampsia. Therefore, maintaining it within normal limits becomes essential.

Homocysteine – normal values

What are the normal homocysteine values? They should be below 10 micromoles/liter (μmol/L). Its detection limit is 2.8 μmol/L. Based on the obtained result, the risk of developing certain conditions or having deficiencies in B group vitamins can be determined.

Since high homocysteine levels are often associated with an increased risk of heart disease, here is how its values are interpreted:

• Between 10 and 15 μmol/L indicates an intermediate risk of cardiovascular disease;
• Between 15 and 30 μmol/L signals an increased risk of developing a cardiovascular condition;
• Values over 30 μmol/L are correlated with very high risks of cardiovascular disease occurrence.

It is also good to know that, in some cases, normal homocysteine levels can be influenced by the administration of certain medications, as well as by:

• administration of vitamin B12 or B6 supplements;
• smoking;
• an unbalanced diet;
• deficiency of certain vitamins;
• diseases such as hypothyroidism or chronic liver and kidney diseases.

Most often, elevated homocysteine is what indicates an increased risk of developing certain conditions.

Elevated homocysteine

In most cases, elevated homocysteine is associated with a deficiency in vitamins B6, B9, and B12. These deficiencies can lead to the onset of several diseases, which is why the mentioned tests are necessary. At the same time, elevated levels of this amino acid are often correlated with the occurrence of cardiovascular diseases.

Determining high homocysteine levels in blood tests can indicate the following:

• blood clot formation;
• blood vessel damage;
• increased inflammation in the body.

All these favor the onset of cardiovascular diseases, particularly atherosclerosis and stroke. Therefore, for individuals over 75 years of age, testing is recommended more frequently.

High homocysteine levels are also associated with impaired cognitive function, favoring the onset of neurodegenerative diseases such as Alzheimer’s and Parkinson’s. These often occur in individuals over 50 years of age, in both women and men.

In young women, elevated homocysteine is associated with certain complications during pregnancy. Thus, pregnant women have increased risks of:

• premature birth;
• preeclampsia;
• fetal growth retardation;
• congenital malformations such as fetal neural tube defects.

Also in women, high homocysteine levels are associated with weakened bone density, predisposing them to osteoporosis and fractures.

Another case where homocysteine has high values is that of the condition called homocystinuria. In this situation, the amino acid has entered the urine. This happens because the kidneys’ function is no longer carried out properly.

Various studies have shown that elevated homocysteine levels are encountered in elderly individuals and those with autoimmune diseases.

Risk factors that can lead to increased homocysteine levels

There are situations where homocysteine levels can increase. These are associated with several risk factors, including:

• an inadequate diet that can affect metabolism and homocysteine intake from food;
• smoking and alcohol consumption are other risk factors for increased homocysteine levels in the blood;
• certain genetic mutations, including MTHFR (methylenetetrahydrofolate reductase), can cause a decrease in the body’s ability to metabolize the amino acid.

Low homocysteine

What we need to know about homocysteine is that it can also have low levels. However, these are not a cause for alarm, so dosages below 10 μmol/L are considered normal. Instead, it is possible for test results to indicate a falsely high concentration of homocysteine in certain situations, such as:

• in patients undergoing methotrexate treatments;
• in individuals taking medications based on nitric oxide, phenytoin, carbamazepine, or S-adenosylmethionine;
• in women using oral contraceptives.

Therefore, when going for homocysteine tests, we must mention if we are taking any medications that may influence its levels.

Homocysteine and ensuring proper intake for the body

Normal homocysteine levels are closely linked to a balanced diet. Paradoxically, deficiencies in folic acid and vitamins B6 and B12 lead to increased homocysteine levels in the blood, affecting detoxification and metabolism processes. Thus, diet plays a crucial role in the metabolism of this amino acid, and an appropriate diet can influence both its increase and decrease.

Foods that increase homocysteine levels in the body

Although a low homocysteine level does not pose a major health risk, folic acid plays an essential role, especially for pregnant women. To support the metabolism of this amino acid, you can consume certain foods rich in methionine, such as:

• eggs;
• brazil nuts;
• animal organs, among which liver is one of the most recommended;
• fish;
• corn;
• avocado;
• lentils;
• green leafy vegetables (broccoli, asparagus).

These are rich in vitamin B12 and folate. In addition to consuming these foods, an active lifestyle is also recommended, which helps in proper body detoxification. For this purpose, sports and consumption of fiber-rich foods are recommended.

On the other hand, there are individuals who need to reduce their homocysteine levels. For them, adopting a slightly modified diet is recommended.

Foods that lower homocysteine in the body

High homocysteine levels are associated with the risk of developing very dangerous cardiovascular diseases. Thus, any diet that helps maintain heart and blood vessel health will also prevent the increase of this amino acid above normal limits.

What can we consume to have a healthy heart and lower homocysteine? Here are some examples of beneficial foods for the body and metabolism:

• fiber-rich vegetables, such as green beans and lentils;
• berries, which are rich in antioxidants;
• apples and plums, two fruits rich in quercetin, which has anti-inflammatory properties;
• foods rich in fatty acids, such as fish with high omega-3 content (wild salmon and sardines), as well as various types of seeds;
• spinach, kale, and lettuce, which have a high folic acid content.

There are numerous foods that support heart health, making it relatively easy to personalize a balanced diet. When we feel the need for an additional intake of B complex vitamins, dietary supplements can be an effective solution to complement the regimen. Besides diet, heart health is also influenced by avoiding a sedentary lifestyle and reducing stress, both of which can indirectly contribute to increased homocysteine levels. Therefore, adopting healthy daily habits is just as important as diet.

In conclusion, what is homocysteine and where is it found? Homocysteine is a non-essential amino acid present in the blood, specifically in plasma, where its dosage is performed. The normal value of homocysteine is below 10 μmol/L, and an increase in this value should alert us. High homocysteine levels can indicate an increased risk of cardiovascular and neurodegenerative diseases. In women, high levels of this amino acid can be associated with pregnancy problems. To maintain homocysteine within normal limits, a balanced diet, rich in methionine and vitamins B6, B9, and B12, is essential. Besides diet, an active lifestyle supports heart and blood vessel health.

References:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5741875/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7073042/

https://my.clevelandclinic.org/health/articles/21527-homocysteine

https://www.bmj.com/content/325/7374/1202

https://www.ahajournals.org/doi/full/10.1161/01.cir.99.1.178

Photo by fernandozhiminaicela on Pixabay.com