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Vitamin B12 Lab Test
Vitamin B12 Lab Test
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Persistent fatigue and thyroid issues can often be linked to Vitamin B12 levels. While a general B12 test may indicate normal total levels, it is the active form of B12, making up only 10-30% of total B12, that plays a critical role in your health. Our Vitamin B12 Test focuses specifically on this active form, providing more accurate insights. For a broader assessment of nutrient status, our comprehensive Vitamin Test measures not only standard B12 but also folate, vitamins D, E, and CoQ10, offering a detailed profile for those addressing fatigue or related health concerns.
What is measured in the Vitamin B12 test?
Holotranscobalamin, the active form of B12.
About the Vitamin B12 Test
Unlike traditional tests that measure both active and inactive forms of B12, this test exclusively measures holotranscobalamin, the biologically active form of B12. This marker offers more precise information about B12 deficiency than other indicators, such as MMA (methylmalonic acid).
With the convenience of a home test kit delivered directly to your door, this test makes it easy to check your B12 levels from the comfort of your own home. If you suspect a Vitamin B12 deficiency, taking this test can help you quickly gain insights into your health.
About Vitamin B12
Vitamin B12 is a vital water-soluble vitamin essential for numerous functions in the body. Unlike other vitamins, the body cannot synthesise B12, so it must be obtained from the diet. B12 comes in two forms, active and inactive, but only the active form bound to transcobalamin is used by cells.
One of the key roles of B12 is in DNA production, supporting cell division and replacement. It also contributes to nerve myelination (the protective covering of nerves) and helps break down homocysteine, a by-product of protein metabolism.
How Vitamin B12 is Absorbed
Though water-soluble, B12’s absorption requires a special mechanism involving the intrinsic factor (IF), a protein produced by the stomach. B12 binds to IF for transport through the intestines and into the bloodstream. Once in the liver, B12 is stored or distributed throughout the body. The liver can store B12 for many years, meaning consistent intake is not always necessary unless these reserves are depleted. Certain groups, such as vegans, alcoholics, and those who have undergone gastric surgery, are at higher risk of B12 deficiency due to reduced IF production.
Symptoms of a B12 Deficiency
A lack of Vitamin B12 can lead to various symptoms that worsen if untreated:
- Fatigue and weakness
- Shortness of breath
- Digestive issues such as stomach pain and diarrhoea
Vitamin B12 deficiency can also affect mental health, leading to:
- Headaches
- Depression
- Anxiety
- Memory problems
Severe deficiencies can cause neurological issues, such as tingling in the extremities, muscle weakness, or more severe conditions like pernicious anaemia.
Vegans and B12 Deficiency
Since Vitamin B12 is naturally found in animal products, vegans are particularly vulnerable to deficiency. Regular supplementation or fortified foods are crucial for maintaining adequate B12 levels. The extent of deficiency often depends on how much B12 was stored in the liver before transitioning to a vegan diet.
How is the Vitamin B12 test carried out?
This test is provided as a home test kit. Once ordered, a kit containing everything needed to collect a blood sample will be delivered to your door. After collecting your sample, simply return it using the pre-paid envelope.
Who should consider testing their B12 levels?
Testing is recommended for individuals who may be at risk of B12 deficiency, including vegans, vegetarians, older adults, those with gastrointestinal conditions, or anyone who has undergone gastric surgery. Additionally, anyone experiencing symptoms such as fatigue, weakness, or neurological issues should consider testing their B12 levels.
What is a normal Vitamin B12 range?
A normal range for Vitamin B12 levels is above 300 pg/ml. Levels below 200 pg/ml indicate a deficiency, while levels above 900 pg/ml may suggest liver or kidney concerns.
Foods rich in Vitamin B12
Vitamin B12 is found in a variety of animal products, including meat, fish, poultry, eggs, and dairy. Foods particularly high in B12 include beef liver, sardines, clams, and dairy products.
Taking a proactive approach to your health by measuring your B12 levels with a simple home test can provide clarity and help guide any necessary dietary or lifestyle adjustments.
FAQ
Before order
Browse through our test categories and symptom guide to find the test that best suits your health concerns. Our product descriptions offer detailed information to help you make an informed choice.
Can I order tests for someone else?
Yes, you can purchase tests for others. Just make sure to enter their details correctly during the order process to ensure the test is registered in their name accurately.
How should I prepare for the test?
Preparation varies depending on the specific test and may include fasting or avoiding certain foods and medications. Each test kit comes with detailed instructions to guide you through the necessary steps.
Should I stop taking medications before the test?
Please refer to the instructions included with your test kit. Certain tests may require you to temporarily stop taking specific medications.
Is fasting required before the test?
Certain tests, such as those for blood glucose or lipid profiles, may require fasting. Refer to your test instructions for detailed requirements.
Should I avoid any foods or drinks before the test?
Depending on the specific test, you might need to steer clear of certain foods or beverages. For detailed guidance, refer to the instructions provided in your test kit.