You can check your B12 levels at home by ordering an at-home test kit, which typically involves a finger prick for blood or collecting a urine sample, sending it to a lab in prepaid packaging, and receiving digital results and sometimes personalized advice. While these kits offer convenience, you may need to fast before a blood test and should always discuss results with a healthcare provider for proper interpretation and next steps, as symptoms can overlap with other issues.
How to use an at-home vitamin B12 blood test
Symptoms of vitamin B12 and folate deficiency anaemia include:
Taking doses of vitamin B-12 might cause: Headache. Nausea. Diarrhea.
There are limited published data regarding the use of supplemental vitamin B12 (in any form) during pregnancy; however, there is no evidence or reason to expect that use would be associated with an increased risk of congenital malformation or other adverse fetal effects.
During pregnancy, ensuring adequate vitamin B12 levels is crucial for fetal development and maternal health. The third trimester is especially significant as the fetus undergoes rapid growth and development, necessitating adequate nutrient transfer from the mother.
To make sure it's safe for you, tell your doctor before having hydroxocobalamin if you:
The foods highest in Vitamin B12 are animal products, with clams and liver (beef, lamb) being exceptionally rich sources, often providing several hundred percent of the daily value in a single serving, alongside seafood like mussels, sardines, and salmon, dairy, eggs, and fortified cereals and nutritional yeast for vegans.
5 Symptoms That Indicate High Vitamin B12 Levels
People may experience frequent episodes of dizziness with no apparent cause. Headaches may be persistent and more intense than common tension headaches.
People need vitamin B-12 for the brain to work well. If not treated, vitamin B-12 deficiency can lead to issues with the nerves, brain or spinal cord. These might include lasting tingling in the hands and feet or trouble with balance.
B12 deficiency can trigger specific food cravings, most notably for meat, fish, or eggs, as the body seeks animal-based sources to replenish the vitamin, especially in those on vegetarian/vegan diets or older adults. While cravings for sugary or salty foods can also signal general B-vitamin issues, the distinct urge for protein-rich animal products is a key indicator, but professional testing is crucial for confirmation.
Cutaneous manifestations associated with vitamin B12 deficiency are skin hyperpigmentation, vitiligo, angular stomatitis, and hair changes. A diagnosis of vitamin B12 deficiency is often overlooked in its early stages because these signs are not specific to vitamin B12 deficiency alone.
The best form of B12 is often considered methylcobalamin, as it's a naturally occurring, active form the body uses immediately, though adenosylcobalamin is also an active form, with a combination often recommended for better results, especially for deficiency or absorption issues, while cyanocobalamin, a cheaper synthetic option, is effective but requires conversion and is less ideal for some. For general supplementation, natural forms like methylcobalamin or adenosylcobalamin are preferred for better retention.
Warning signs of vitamin B12 deficiency include extreme fatigue, weakness, pale/yellow skin, numbness/tingling (pins and needles), cognitive issues (memory fog, confusion), mood changes (depression/irritability), and a sore, red tongue, alongside potential shortness of breath, heart palpitations, and balance problems, as symptoms develop slowly and can worsen over time. It's crucial to see a GP, as early treatment prevents potentially irreversible neurological damage, say NHS, Cleveland Clinic, and WebMD.
See a GP if you think you may have a vitamin B12 or folate deficiency. These conditions can often be diagnosed based on your symptoms and the results of a blood test. It's important for vitamin B12 or folate deficiency anaemia to be diagnosed and treated as soon as possible.
If your deficit is mild, you may respond quickly to medication and eating more foods containing B12. If you have chronic low B12 levels or have underlying health conditions that cause the deficiency, you may need to take B12 for the rest of your life (or for as long as you have the underlying condition).
Vitamin B12 Deficiency Has Nothing To Do With Weight Gain
There is very little evidence to suggest that vitamin B12 affects the process of gaining or losing weight, despite the numerous techniques involved. Most of the evidence supporting this claim comes from a few observational studies.
In conclusion, our results show that lower vitamin B12 was associated with insomnia symptoms and sleepiness in specific groups of participants. However, further research with objective measurements of sleep is crucial to assess the relationship between sleep and vitamin B12.
If you have vitamin B12–deficiency anemia, you may have the typical symptoms of anemia at first, such as fatigue, paleness, shortness of breath, headaches, or dizziness. If left untreated, you may start to notice brain and nervous system symptoms.
Milk. One of the best drinks with B12 is milk. One cup of whole milk contains approximately 1.32µg of vitamin B12.
Apples and bananas help improve gut health, supporting better B12 absorption. Some fortified fruit juices (like orange juice) may include added B12.
Your doctor likely stopped B12 injections due to following standard guidelines suggesting oral supplements or for reasons like cost/logistics (especially during the pandemic), but this can be risky; the main reasons are often a perceived 'normal' blood test (which doesn't always reflect cell levels) or a guideline shift, but you may still need injections for neurological symptoms or poor absorption, so discuss your symptoms urgently with your doctor and ask for clear evidence for the change.
Cautions with other medicines
Pharmacists can administer intramuscular vitamin B12 treatment where there is a therapeutic need, they are suitably qualified and all professional obligations are met.