Updated: 01/16/2018

B12 Shot Review - 6 Things You Need to Know


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, Burn HD.

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 While the product websites do not cite the full list, they do mention several others, including Water, Citric Acid, and Potassium Sorbate.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…

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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.

What Users Are Saying

"”I am surprised how well this works. I have several auto immune disease’s. All of them bring extreme fatigue. The past 4 months the fatigue has been worse than usual. I tried a B12 pill & didn’t have any change. I’ve only been using this for a few days & feel a big difference.”"

"”Take it daily, taste okay, but after a month, don’t really notice an improvement.”"

"”The liquid vitamins made me immediately vomit. I tried in a few different drinks, but same result.”"

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.

Learn More About Burn HD »
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B12 Shot

What do B12 shots do for you?

Vitamin B12 aids your body in efficiently using carbohydrates and fats for energy, and also in creating new protein. B12 is also crucial for maintaining normal nerves, cells and blood. The man-made form of vitamin B12 is called Cyanocobalamin, and it can be used to treat a deficiency in B12.

Why do people take vitamin B12 shots?

Many who take B12 shots to address a B12 deficiency, which produces a wide range of negative symptoms, including fatigue, memory failure, low blood pressure, depression, anemia, high homocysteine levels, and mood disorders. The B12 shot can additionally be prescribed as a treatment for depression, or to boost a subject’s energy or increase cognition.

How do I know if B12 Shot is right for me?

Choosing the right product is the #1 question asked by DietSpotlight readers. We recommend trying any product before buying it and know that finding a product with a sample offer is near impossible - so we created our own product, Burn HD, with scientifically backed ingredients.

Click here to get your sample of our powerful fat burner today.

What is vitamin B12 used for?

Vitamin B12 is ingested orally to prevent or treat a situation where a person’s B12 blood levels are lower than minimum standards. It is also orally ingested in the treatment of pernicious anemia, a condition mostly found among older people, which is caused by a lack of vitamin B12.

What does vitamin B12 do in the body?

Vitamin B12 aids the body in creating DNA, the building block material in all the body’s cells. Also, B12 maintains nerves and blood cells, and helps fight megaloblastic anemia, a type of anemia that causes sufferers to experience tiredness and weakness. Normally, the body absorbing B12 is a two step process.

Do vitamin B12 injections work for weight loss?

There is no concrete evidence proving that B12 shots conclusively help with weight loss. However, some people who believe strongly in B12 shots say that the injections can give a person more energy and cause a faster metabolism, which can aid in weight loss. It should be noted that unless a person is suffering from vitamin B12 deficiency, B12 shots are unlikely to give a person a significant energy boost.

What are the side effects of vitamin B12 injections?

Some possible side effects of vitamin B12 injections are: dizziness, nausea or an upset stomach, headache, tingling and/or numbness, weakness, joint pain, a rash or general itchiness, or pain, redness, irritation or swelling at the site of the shot.

What is vitamin B12 good for weight loss?

Vitamin B12 aids the body in creating energy from proteins and fats. A deficiency in B12 can cause several health issues, the most significant of which is megaloblastic anemia, the result of a diminished red blood cell count in the blood. Sufferers of this form of anemia most commonly report feeling fatigued.

What are the side effects of vitamin B12?

The most commonly reported side effects from Vitamin B12 are:

How long does it take for a B12 shot to take effect?

According to HeathCentral.com, people who take B12 shots may observe B12 deficiency symptoms improving with 2-3 days of their first B12 shot. Oral doses of B12 will take longer to clear up B12 deficiency symptoms, and nasal sprays act faster than oral doses.

What is the generic name for B12?

The name of the man-made form of B12 is Cyanocobalamin. This compound is used in the treatment of B12 deficiency in people suffering from a number of conditions, such as pernicious anemia. B12 is also crucial for blood formation, the reproduction of cells, the synthesis of tissue and protein, and general growth.

Do vitamin B12 supplements work?

If possible, it’s recommended that people try to get their vitamin B12 through food, as many dairy and meat products are rich in B12. If a person has eliminated dairy, meats, and also fortified cereals from their diet, it may be necessary to take supplemental B12, which can also be used to treat a deficiency.

Are vitamin B12 supplements safe?

Vitamin B12 supplements are most likely to be safe if taken at levels equal or less than the recommended dietary amounts (RDA). B12 supplements should be used with caution by people with heart conditions, as it’s been observed that there is an increase in restenosis rates after combined B12 supplementation and stent placement.

What is cyanocobalamin injection used to treat?

Cyanocobalamin, the main-made form of vitamin B12, is used to aid in cell reproduction, the synthesis of tissue and protein, the reproduction of cells, and general growth. People with pernicious anemia, as well as a few other conditions, treat those conditions with Cyanocobalamin.

What are the health benefits of vitamin B12?

Vitamin B12, soluble in water, is important for keeping red blood cells and nerves in the body healthy and functioning, and is crucial to the steady function of a number of other important bodily processes. Vitamin B12 also wards off B12 deficiency, which can cause fatigue in the sufferer.

What is vitamin B complex used for?

Vitamin B complex is a combination of several B vitamins, and includes B6, B12, thiamine, niacin and niacinamide, folic acid, pantothenic acid, and riboflavin. It’s used to combat vitamin deficiency caused by certain nutrient-poor diets, as is taken by people suffering from alcoholism or certain ailments, and also during pregnancy.

What happens if you take too much vitamin B12?

Vitamin B12 is perfectly safe for almost everyone, but nerve damage can result from over-ingesting/injecting B12. B12 is absolutely necessary to remain healthy and feel energized, but if taking supplements, it’s possible to have an excess of B12.

What is vitamin B12 deficiency?

Certain small intestine conditions, like parasites, bacterial growth, celiac disease, or Crohn’s disease. A condition called atrophic gastritis, which is a thinning of the stomach lining. Pernicious anemia, which prevents the body from efficiently absorbing B12. As well as a small number of disorders of the immune system, like lupus or Graves’ disease.

What foods are high in B 12?

The following is a list of foods which naturally contain high levels of vitamin B12: Beef Liver, with 71 mcg in every 3 ounce serving

Can you overdose on vitamin B12?

It’s very difficult to overdose on Vitamin B12, as 10,000 injections per day would not be a sufficient amount to induce an overdose. If side effects such as changes in heart rate and blood pressure or a redness in urine and skin are observed, these symptoms are both harmless and temporary.


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.
Summer Banks Dietspotlight Author
About the Author:

Summer Banks, Director of Content at Dietspotlight, has researched over 5000 weight-loss programs, pills, shakes and diet plans. Previously, she managed 15 supplement brands, worked with doctors specializing in weight loss and completed coursework in nutrition at Stanford University. full bio.

13 B12 Shot Reviews

  • Your Name

    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?

    • rn

      b12 should be given intamuscular not in abdomen

    • 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.

  • 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

    • j.

      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.

      • Your Name

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

    • 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.

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

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

    • rn

      use a new needle with each injection.