- Which form of vitamin b12 is best?
- Is oral b12 as effective as injections?
- Can the body absorb b12 supplements?
- How is vitamin b12 best absorbed?
- What medications should not be taken with b12?
- Why can’t patients take b12 orally?
- Is it better to take b12 shots or pills?
- Can I take b12 tablets as well as injections?
- How long do b12 supplements take to work?
Which form of vitamin b12 is best?
Methylcobalamin (Methyl group + B12) the most active form of B12 seems to be better absorbed and retained in our tissues in higher amounts than the synthetic cyanocobalamin.
Methylcobalamin is used much more efficiently by the liver, brain and nervous system..
Is oral b12 as effective as injections?
In both studies, high-dose oral B12 was as effective as intramuscular injection at achieving neurologic and hematologic response. Vitamin B12 is available over the counter in the form of tablets (100, 500, 1,000, or 5,000 mcg) and lozenges (50, 100, 250, or 500 mcg).
Can the body absorb b12 supplements?
Your body can’t absorb all the vitamin B-12 from dietary supplements. Absorption is limited by how much intrinsic factor your stomach makes. Intrinsic factor is needed for your body to absorb B-12. For example, only about 10 mcg of a 500 mcg oral supplement is actually absorbed in healthy people.
How is vitamin b12 best absorbed?
In the stomach, hydrochloric acid and enzymes unbind vitamin B12 into its free form. From there, vitamin B12 combines with a protein called intrinsic factor so that it can be absorbed further down in the small intestine. Supplements and fortified foods contain B12 in its free form, so they may be more easily absorbed.
What medications should not be taken with b12?
Certain medications can decrease the absorption of vitamin B12, including: colchicine, metformin, extended-release potassium products, antibiotics (such as gentamicin, neomycin, tobramycin), anti-seizure medications (such as phenobarbital, phenytoin, primidone), medications to treat heartburn (such as H2 blockers …
Why can’t patients take b12 orally?
Myth: Replacement of vitamin B12 deficiency because of pernicious anemia must not be done orally. For decades, it has been taught that vitamin B12 deficiency in patients with pernicious anemia is due to poor B12 absorption caused by a lack of intrinsic factor, and that replacement must be given intramuscularly.
Is it better to take b12 shots or pills?
Which is better—the B12 pill or the shot? A. Low B12 can cause anemia and fatigue. For many people with low B12 levels, a daily supplement in the form of a pill is as effective as taking a monthly muscle injection.
Can I take b12 tablets as well as injections?
A) As said previously there is no clinical evidence to say injections work better than tablets. Current evidence suggests the tablet will work just as well within the body, which will continue to absorb theB12 just as it does from the injection. A) B12 is the largest of the vitamin molecules.
How long do b12 supplements take to work?
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.