Can B12 cause weight loss
Emma Valentine
Published Mar 04, 2026
Therefore, it can’t be concluded that vitamin B12 causes weight loss. More research is needed to determine whether vitamin B12 directly affects body weight or BMI. Some studies show that lower levels of vitamin B12 may be associated with a higher risk of overweight or obesity.
What are the symptoms of not having enough B12 in your body?
- a pale yellow tinge to your skin.
- a sore and red tongue (glossitis)
- mouth ulcers.
- pins and needles (paraesthesia)
- changes in the way that you walk and move around.
- disturbed vision.
- irritability.
- depression.
Does B12 help with metabolism?
B-12 is essential for the metabolism of proteins and fats . It needs B-6 and folate to work correctly. B-6 also helps metabolize protein. Thiamine helps the body metabolize fat, protein, and carbohydrates.
What are the side effects of too little B12?
B12 deficiency can cause a variety of symptoms, including fatigue, headaches, depression, pale or yellow skin, mental impairment, and pain and inflammation in the mouth and tongue.Can B12 cause weight gain?
In most cases, taking a B vitamin will not lead to weight gain. However, people who are deficient in vitamin B12 might notice the scale creep upwards once they start supplementing. That’s because loss of appetite is a symptom of vitamin B12 deficiency.
How can I raise my B12 levels fast?
- Beef, liver, and chicken.
- Fish and shellfish such as trout, salmon, tuna fish, and clams.
- Fortified breakfast cereal.
- Low-fat milk, yogurt, and cheese.
- Eggs.
How long does it take to feel better from vitamin B12 deficiency?
Once you begin treating your vitamin B12 deficiency, it can take up to six to 12 months to fully recover. It is also common to not experience any improvement during the first few months of treatment.
What is considered a low B12 level?
Understanding the Results But a normal level of vitamin B12 in your bloodstream is generally between 190 and 950 picograms per milliliter (pg/mL). Between 200 to 300 pg/mL is considered borderline and your doctor may do more testing. Below 200 pg/mL is low and more testing is needed.What is the main cause of vitamin B12 deficiency?
However, the most common cause of vitamin B-12 deficiency anemia is a lack of a substance called intrinsic factor, which can be caused when your immune system mistakenly attacks the stomach cells that produce this substance. This type of anemia is called pernicious anemia.
Can B12 cause anxiety?B12 Causes Psychiatric Symptoms: B12 deficiency can cause almost any psychiatric symptom, from anxiety, and panic to depression and hallucinations. This is because B12 deficiencies trigger symptoms in the nervous system and red blood cells.
Article first time published onCan you overdose on 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.
How quickly does B-12 shot work for weight loss?
It’s common to start losing weight within your first week post-injection. Although the goal is to drop a steady one to two pounds per week, some weight loss patients lose even more when they first get started with lipotropic B-12 injections.
How often should I get B-12 shots for weight loss?
If your weight loss plan includes these injections, your provider will administer them weekly. Some practitioners might recommend B-12 shots up to two times per week for energy and fat metabolism. Some doctors recommend B-12 injections if you’re having an overall deficiency in this micronutrient.
Which vitamins cause weight gain?
Core tip: B vitamins are a known fat gain promoting factor. Food fortification-induced high vitamin consumption is followed by a rapid increase in obesity prevalence.
How does B12 affect metabolism?
B12 works by converting the food we eat into sugar and other types of fuel that keep the body running smoothly. B12 is often associated with weight loss because of its ability to boost metabolism and provide lasting energy.
What happens when you start taking B12?
Helps With Red Blood Cell Formation and Anemia Prevention Vitamin B12 plays a vital role in helping your body produce red blood cells. Low vitamin B12 levels cause a reduction in red blood cell formation and prevent them from developing properly ( 2 ).
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 …
Is B12 deficiency a chronic illness?
While some B12 deficiencies are caused by diet, the most common reason for low B12 levels worldwide is an autoimmune disorder called pernicious anaemia. This is a chronic form of low B12 that can have serious consequences on health if left untreated long-term.
How do you fix B12 deficiency?
A serious vitamin B12 deficiency can be corrected two ways: weekly shots of vitamin B12 or daily high-dose B12 pills. A mild B12 deficiency can be corrected with a standard multivitamin. In many people, a vitamin B12 deficiency can be prevented.
Can Vitamin B12 affect your eyes?
Disturbed or blurred vision can also occur as a result of a Vitamin B12 deficiency. This happens when the deficiency causes damage to the optic nerve that leads to your eyes. The nervous signal that travels from the eye to the brain is disturbed due to this damage, leading to impaired vision.
Is 170 low for B12?
Diagnosis of B12 deficiency. B12 deficiency is usually detected through a B12 blood level. Typical lower limits of normal are 200 pg/ml. Levels between 150 and 300 should be confirmed with secondary surrogate markers (see following).
Can B12 deficiency cause shaky hands?
Vitamin B12 is essential to maintain a healthy nervous system. A deficiency of vitamin B12, B-6, or B-1 could lead to the development of hand tremors. The recommended dietary allowance (RDA) of vitamin B12 for adults is 6 mcg, but you may need more if you take a medication that hinders vitamin absorption.
Does low B12 cause high blood pressure?
Discussion. We found that a higher intake of vitamin B12 was associated with lower systolic and diastolic blood pressure and a higher intake of folic acid was associated with lower systolic blood pressure in children.
Is B12 good for mental health?
Some clinical studies have shown that higher Vitamin B12 levels in the body resulted in better outcomes in patients suffering from depressive and other mental health disorders [6], whereas some studies have also stated that adolescents with borderline levels of serum Vitamin B12 levels develop cognitive changes …
Is it OK to take 1000 mcg of B12 a day?
The recommended dose for treating vitamin B12 deficiency is 1000 mcg daily. The recommended dose for preventing vitamin B12 deficiency is 1500 mg or 2500 mcg (sublingual tablets) daily. The dose for treating hyperhomocysteinemia is 400 mg daily in combination with folic acid.
What are the benefits of B12 injections?
- Increases Energy Levels and Concentration. …
- Improves Metabolism and Helps With Weight Loss. …
- Boosts the Immune System. …
- Helps Improve Sleep Patterns. …
- Helps Stop Certain Types of Hair Loss.
How much B12 does a woman need?
Life StageRecommended AmountTeens 14–18 years2.4 mcgAdults2.4 mcgPregnant teens and women2.6 mcgBreastfeeding teens and women2.8 mcg
What is the best injection for weight loss?
Saxenda® (liraglutide) injection 3 mg is an injectable prescription medicine used for adults with excess weight (BMI ≥27) who also have weight-related medical problems or obesity (BMI ≥30), and children aged 12-17 years with a body weight above 132 pounds (60 kg) and obesity to help them lose weight and keep the weight …
Does vitamin B12 injections increase appetite?
But unless you have a vitamin B12 deficiency, vitamin B12 injections aren’t likely to give you an energy boost.” Ironically, the National Institutes of Health says that symptoms of B12 deficiency include loss of appetite and weight loss. But don’t let that tempt you because it can cause serious neurological damage.
What is the skinny shot?
What are Skinny Shots? Skinny Shots, or Lipotropic injections, are a mixture of B vitamins, amino acids, and lipotropic agents. They are used to help patients with generalized weight loss by boosting energy and metabolism and increasing removal of fat from the body.
Which is better B12 injections or tablets?
If you have vitamin B12 deficiency, vitamin B12 tablets may be as effective as injections. They are readily available, cheaper, and taken orally with ease. However, vitamin B12 injections are more readily absorbed in the body and do not have to be administered as often as oral tablets.