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Will Vitamin B12 Boost Energy if I don’t have B12 Deficiency? YES!



If you have vitamin B12 deficiency, then it’s crucial that you take vitamin B12 for stamina, mental alertness, athletic performance, and minor pain relief.  Untreated, B12 deficiency can cause nerve damage, fatigue, decreased energy, memory loss, depression, and anxiety. 


But what if you don’t have B12 deficiency?  According to many cited studies, the benefits of vitamin B12 in boosting energy and sports performance to people who don’t have vitamin B12 deficiency are still abundant.

Why you need vitamin B12

Vitamin B12 (cobalamin) performs many important, necessary biochemical functions in your body…

  • Vitamin B12 aids in DNA synthesis, so that your red blood cells develop normally.  Without vitamin B12, your red blood cells become deformed, and are unable to leave your bone marrow, and stay there, resulting in insufficient oxygen throughout your body and causing chronic fatigue and low energy.
  • Vitamin B12 protects your nerves by helping to maintain your myelin sheathe, which insulates each nerve cell. Without B12, your nerve cells would be exposed and vulnerable, resulting in severe neurological damage such as peripheral neuropathy.
  • Vitamin B12 is used to convert proteins and carbohydrates into energy. Without sufficient vitamin B12, you experience symptoms like fatigue, attention problems, muscular feebleness, irritability, and brain fog.
  • Vitamin B12 helps your body repair cells. Researchers who studied athletic performance with vitamin B12 deficiency noticed a high correlation of poor energy levels, decreased sports performance, torn muscles, and inability to build proper muscle tone.  But after vitamin B12 supplementation, scientists noticed increased stamina, improved muscle tone, and restored athletic abilities.

Vitamin B12- the energy vitamin

In a famous study focusing on the use of high-dose vitamin B12 in the cyanocobalamin form for sustaining energy levels, scientists found that supplementing with 2,500-5,000 mcg of vitamin B12 every few days (far exceeding the RDA for vitamin B12) resulted in 50%-80% increase in stamina, mental alertness, and general feelings of wellbeing after only a few weeks.

5-Hour Energy Drinks with Vitamin B12- What’s the Catch?

Vitamin B12 feels good

Will Vitamin B12 Boost Energy if I don’t have B12 Deficiency? YES! In a double-blind crossover study focusing on vitamin B12 for treating tiredness, people who had low energy but did not suffer from vitamin B12 deficiency or chronic fatigue syndrome were given 5,000 mcg of vitamin B12 or a placebo two times per day for two weeks. 

While the placebo had no effect, tired individuals who received the vitamin B12 injections noticed a significant increase in energy, mental focus, and improved mood.

Similarly, a separate study on people with normal vitamin  B12 levels found that regular supplementation of high-dose vitamin B12 resulted in significantly better mood, increased energy, and improved cognitive functioning, versus the placebo, which had no effect on mood or energy.   

In this study, doses varied from 3,000 mcg of vitamin B12four times per week to 9,000 mcg of vitamin B12 per day.

How much vitamin B12 do I need?

The USRDA for vitamin B12 for healthy individuals ranges from .4 mcg -2.8 mcg of vitamin B12.  However, that’s not nearly enough to avoid vitamin B12 deficiency, the standard prescribed vitamin B12 shot amounting to 1000 mcg per week.  And that’s just to prevent neurological damage and cognitive impairments.

To maintain healthy energy levels with vitamin B12 (even if you’re not deficient) you might need to take anywhere upwards of 3,000 mcg of B12, several times a week.  Since there is no upper limit established for vitamin B12 supplementation, there’s no danger of overdosing on B12.


Please tell us…

Are you a bodybuilder who uses vitamin B12 shots for increased energy and muscle mass?

Do you suffer from low energy and chronic fatigue, though you haven’t tested positively for vitamin B12 deficiency?

We welcome your comments!

Spread the love…

Please share this article with your friends, family, or anybody you care about!

Read more about vitamin B12- the energy vitamin

Tired of being Tired all the Time…It’s Tiring!

Chronic Fatigue Syndrome- What is it, exactly?

I have Fibromyalgia…Which Supplements should I take?


The rationale for using high-dose cobalamin (vitamin B12) CFIDS Chronicle Physicians’ Forum

A pilot study of vitamin B12 in the treatment of tiredness

Vitamin B-12: placebo or neglected therapeutic tool?  PubMed, NCBI

Vitamin supplementation and athletic performance- PubMed, NCBI


nattu, YIM Hafiz

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2 Responses to “Will Vitamin B12 Boost Energy if I don’t have B12 Deficiency? YES!”

  1. Sharon Sinelli Says:

    I have just finished reading a book called “Could It Be B12? An Epidemic of Misdiagnoses”, by Sally M. Pacholok and Jeffery J. Stuart. I was astounded and saddened by what I read. The medical community (our doctors) are not trained to recognize or test for B12 deficiencies; thus millions of people…from children to the elderly suffer needlessly. The test that doctors do do are unreliable; although there are reliable tests that can be done (urinary MMA). Treatment for deficiency is inexpensive and easy. Instead they do expensive, invasive and unnecessary tests and prescribe meds that cause severe side effects to treat symptoms…when the cure is simple. This book is a must read!!!

  2. linda Says:

    Thanks, Sharon! I agree- B12 screening should be standard for many patients. Thanks for the book review!

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