Updated: 07/18/2017 - Site sponsored by Dietspotlight Burn

B12 Shot Review- Does This Vitamin Really Work?

  • 13 User Comments
  • Rating: 4.5. From 8 votes.
By Summer Banks Jun 08, 2017

We’re hearing a lot of buzz about B12 Shot. We wanted to dig deep, so we looked at the ingredients, possible side effects, research and customer service. There were also hundreds of reviews considered. We summarized everything to give you the bottom line.

B12 Shot Readers: Click here to find out why we're giving away samples of our product, Dietspotlight Burn.

What is a B12 Shot?

Firstly, these drops are a highly concentrated vitamin supplement that’s supposed to boost energy and, potentially, support weight-loss. B12 Shot ingredients include large amounts of Vitamin B12. While the product websites do not cite the full list, they do mention several others, including Water, Citric Acid, and Potassium Sorbate.

There are multiple manufacturers. Some specialize in the oral supplement and others in B12 injections. If taken by mouth, you do not need a prescription. We like that these are all natural and you can find them anywhere, but read on…

Taste – “Yuck!”

Our first concern with vitamin B12 Shots is the poor taste. “If something doesn’t have a good flavor, people aren’t going to use it. Some complain it is so bad they want to vomit,” said our Research Editor.

”I dislike the taste. It’s the color and consistency of Nyquil cough syrup that I took as a child. Yuck. My children tried tasting a drop and hated it,” said one user.

”It tastes pretty terrible. It is very oranges so be careful when dosing so you don’t get it places it could stain,” shares a dieter.

Others love the taste.

“This particular one has no scent but has a citrus, almost tart taste. I was a little worried that it would have a strong taste and that I wouldn’t be able to tolerate it. However, it’s not bad at all,” was an experience.

“The taste is super sweet/sickly sweet but not disgusting that will make me vomit,” said another.

B12 Shot Inaccurate Dosing – “Potential Problem?”

Several customers complained the dropper didn’t allow them to get the right dose.

”I tried many times to get 1 ml into the dropper, but the most I could get is closer to 3/4 ml, often times it ended up being 1/2 ml,” said a customer.

”The dropper does not provide equal dosing,” explained another.

Others were able to make it work just fine and noticed changes as a result.

“I recommend this to anyone with low b12 or if you’re tired all the time. Worth a shot, it’s helped me,” said a reviewer.

“I have been taking your B12 liquid supplement for only a few days, but I’m already seeing results. I am getting the best restful sleep I have had in years. My energy and focus are improving also,” as another customer put it.

Our years of experience have taught us that it only takes a simple thing, like poor flavor, to send customers running to the competition for a better solution. In this case, if the taste of vitamin B12 shots is terrible, dieters won’t take it more than once.

The Science – “B12 Helps, But…”

Vitamin B12 is connected with energy production, science proves that without a doubt. What is missing is a connection with taking extra and losing weight. There’s just no reason to believe this will happen, especially since the body pushes out any extra as it is not stored.

At DietSpotlight, we want to see science connected to weight-loss before we can recommend any product.

The Bottom Line – Does B12 Shot Work?

What’s the real deal with B12 Shot? We like that it’s natural and the availability is amazing, as is the price, but we are skeptical about suggesting it for weight-loss. The science just isn’t there and no matter the cost, if it doesn’t work it’s a waste of money.

If you want to shed those extra pounds, why not try a supplement with clinically tested ingredients shown to you reach your weight-loss goals?

Among the best products we’ve seen this year is Dietspotlight Burn. It’s made with a unique blend of four ingredients, all of which have been shown in clinical testing to help support metabolism and fat loss. Our review of customer feedback showed no negative comments or mentions of harmful side effects, so we know users are getting solid results.

Also, readers can get a Special Trial Offer directly from the manufacturer, and this the kind of thing we love to see.

Previous B12 Shot Review (Updated August 12, 2013):

What You Should Know About the B12 Shot

B12 Shot is a liquid dieting supplement that claims to cause rapid weight loss. The product contains large quantities of Vitamin B12, along with other nutrients. The product claims to decrease water retention, detoxify the body, boost the metabolism, and stimulate the thyroid gland. The manufacturers claim that for the product's full potential to be reached, a heavy dairy diet is needed. Dairy products contain large amounts of vitamins, primarily Vitamin B12, and the manufacturers claim this will boost the affects of B12 Shot.

List of Ingredients

B12 Shot contains large amounts of Vitamin B12. While the product's website does not cite the full ingredients list, they do mention several other ingredients. Water, Citric Acid, and Potassium Sorbate are all mentioned ingredients.

Product Features

The number one feature of the product is that, the manufacturers claim, you can take B12 Shot and receive an increase in energy without the crash later on. The manufacturers claim this is due to the fortifying vitamins and other natural ingredients in B12 Shot. The manufactures of B12 Shot claim that the effect of their product is the same as receiving injections of Vitamin B12, which many people receive because of its healthy effect on the body. They claim their product has 2,000 mcg of Vitamin B12, the same as one injection. They offer the same effect, without the hassle and pain of a needle. B12 Shot also claims to aid in rapid weight loss, if taken with proper exercise.

Advantages of a B12 Shot

  • B12 Shot is a healthy and nutritious product that contains large quantities of vitamins and minerals.
  • The manufacturers claim that if taken regularly, B12 Shot cleanses the digestive system, promotes better overall body health, and supports a healthy heart and central nervous system.

Disadvantages of a B12 Shot

  • The manufacturers of B12 Shot are vague about the product's contents. The website fails to clearly outline the full list of ingredients, as well as providing a picture of the products ingredients label.
  • The manufacturers fail to specify if the product has successfully gone through clinical tests, nor does the FDA give their consent of the product.
  • The product's website fails to provide before and after pictures. They also fail to provide customer bios about the product.
  • B12 Shot seems relatively overpriced. They also fail to give any type of promotion or discount for purchasing the product.
  • The manufacturers fail to incorporate any type of dieting or exercise plan to be used with their product.


While B12 Shot is a healthy and nutritious product, that the manufacturers claim will boost the body's overall health and performance, these claims seem to be somewhat exaggerated. While B12 Shot has been on the market for a long period of time, there just does not seem to be enough information, either presented by their own website or other affiliated websites, that back up the claims presented by the manufacturers of B12 Shot.

B12 Shot Side Effects:

Diet products either work or they don’t. Period. Let’s find out which one B12 Shot is. We will take a comprehensive look at side effects. (Feel free to read our full B12 Shot review.) Our focus turns to potential reactions relating to the supplement; concentrating on clinical research. We’ll also analyze hundreds of customer comments. Then, we’ll summarize the info to give you the bottom line.

What You Need to Know

First off, B12 Shot is a water-soluble injection containing a B-vitamin complex. The dose is based upon the recommendations of your healthcare provider. If you have concerns taking pills, the shot is a good option.

The vitamin, discovered around 1934 by George Hoyt Whipple and George Richards Minot, is essential to producing energy. You can get the shot through a physician, but some patients also perform them at home. We like that it has been around for decades and that we found some positive customer comments, but read on…

B12 Shot Mood Changes – “Feeling Off?”

The first concern relating to B12 Shot side effects was mood changes. “You’d think because this product is naturally found in foods, there would be no issues,” said our Research Editor. “This option packs in a huge amount of the vitamin, which could be the reason for the reactions.”

“I was fine until I took the shot, afterwards, it had caused mental changes as well as mood changes,” commented a user.

“Confusion is listed as a potential B12 shot side effect,” reported Medline Plus from the National Institutes of Health.

Body Changes – “Side Effects”

According to several comments on the web, B12 Shot ingredients caused body changes. According to WebMD, side effects may include “pain/redness at the injection site, mild diarrhea, itching, or a feeling of swelling all over the body…”

One patient claims, “I had my first injection about three weeks ago. Yesterday I fainted for the first time in my life. I’m always tired, dizzy, have a nasty headache and feel like crap.”

Throughout our experience, we’ve found that a small part of a product, like body changes, could hinder long-term success. If B12 Shot affects you, why use it?

The Science – “Proof?”

There’s a wealth of information available relating to the injections and weight-loss, but the findings are mixed. According to the National Institutes of Health Office of Dietary Supplements, “no evidence shows that vitamin B12 [vitamins] increase energy or improve athletic performance.” At DietSpotlight, finding research to support claims is critical. If the B12 Shot isn’t fully supported, we don’t bother with it.

The Bottom Line – Does the B12 Shot Work?

So, should you race to your physician for the B12 Shot? We like that the vitamin has been around for decades and that we found some positive customer comments, but we have reservations because there’s inconclusive research linking the injections to weight-loss. Plus, we’re concerned about the product causing body and mood changes.

If you’d like to drop those extra pounds, we recommend going with a supplement with no reported side effects that’s backed by published clinical research.

Among the best products we’ve seen this year is one called Dietspotlight Burn. The supplement consists of a formula containing a proprietary blend of four ingredients, which have been shown in published scientific research to help boost metabolism and jump start fat loss. There’s no reports of negative side effects and customer comments on the web highlight people seeing amazing results.

Also, the company behind Dietspotlight Burn is so confident in their supplement, they’re providing a Special Trial Offer, which is a bonus.

Learn More About Dietspotlight Burn »
Summer Banks Dietspotlight Author
About the Author:

Summer Banks, a content strategist at Dietspotlight, has researched over 5000 products in the past 10 years. She has years of nursing training, experience as a manager responsible for 15 supplement brands, and completed coursework on Food and Nutrition from Stanford University. full bio.

Rating: 4.5. From 8 votes.
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Leave a comment or review


Can b12 shots take your hair out?

Maribel (Editor)

Hello. All users are different and can experience different side effects; please make sure to consult with your physician before taking this product.

  What can I use to get rid of large bruises on my stomach?
P W (Verified User)

I am getting large bruises on my stomach because of the shots. What can I use to get rid of them?

Maribel (Editor)

Hi. Please make sure to consult with your physician before continuing to take this product and let them know about the side effects you were experiencing.


b12 should be given intamuscular not in abdomen

  What are the side effects of B12 shot?

what are side effect?

Maribel (Editor)

Hello Maryann. All users are different and can experience different side effects; please make sure to consult with your physician before taking this product.

  Why having pain after taking it?
amy (Verified User)

why would i have armpit and breast pain after a vitamin b 12 shot

Maribel (Editor)

Hi Amy. Please make sure to consult with your physician before continuing to take this product and let them know about the side effects you were experiencing.


If you find an answer, please lmk. I have experienced stimulation in my breasts since taking the shots. Health provider insists this could not be from the shots, but it is the only thing I am doing differently.


I just started B12 injections because of being tired. I do not feel well since then can this be due to the injections?

  What would be the best to replace the needle B12 shot?

what would be the best to replace the needle B12 shot?


use a new needle with each injection.