Can B12 tablets replace injections?
Oral vitamin B12 can provide an effective alternative to intramuscular injections, so giving patients a choice and reducing costs in primary care.
What is the most effective form of vitamin B12?
Methylcobalamin. Methylcobalamin is the most bio-available type of Vitamin B12 which means the body absorbs it more easily. Naturally occurring, it is found in animal-based foods such as meat, fish, milk and eggs so is readily available in many people’s daily diet.
Are B12 tablets effective?
Research now shows that high doses of oral vitamin B12 (eg. 1000mcg daily) can be just as effective at treating deficiency, even in the absence of intrinsic factor, and may be a suitable alternative to intramuscular injections for many people.
What are the negatives of B12 injections?
Are There Any Drawbacks?
- Minor swelling or itching at the injection site.
- Mild diarrhea.
- Headaches and dizziness.
- Nausea.
- Low potassium levels.
- Skin rashes.
How long does it take for B12 tablets to work?
It may take a few weeks before your vitamin B12 levels and symptoms (such as extreme tiredness or lack of energy) start to improve. If you have hydroxocobalamin injections to boost your vitamin B12 levels at the start of treatment, the cyanocobalamin tablets may start to work within a few days.
What is a safe amount of vitamin B12 to take daily?
While the recommended daily amount of vitamin B-12 for adults is 2.4 micrograms, higher doses have been found to be safe. Your body absorbs only as much as it needs, and any excess passes through your urine. High doses of vitamin B-12, such as those used to treat a deficiency, might cause: Headache.
Can you have too much B12?
Since B12 is a water-soluble vitamin, it’s generally considered safe, even at high doses. No Tolerable Upper Intake Level (UL) has been established for B12, due to its low level of toxicity. UL refers to the maximum daily dose of a vitamin unlikely to cause adverse side effects in the general population.
How long after taking vitamin B12 will I feel better?
A response usually is seen within 48 to 72 hours, with brisk production of new red blood cells. Once B12 reserves reach normal levels, injections of vitamin B12 will be needed every one to three months to prevent symptoms from returning.
Is 5000 mcg B12 too high?
While megadoses of up to 2,000 mcg are considered safe in treating B12 deficiency, it’s always best to avoid excessive amounts of any vitamin, especially when it’s not needed.
