![]() ![]() You hereby agree that you shall not make any health or medical-related decision based in whole or in part on anything contained in the Site. We highly recommend that you consult your registered medical practitioner for all queries or doubts related to your medical condition. The absence of any information or warning to any medicine shall not be considered and assumed as an implied assurance. Nothing contained on this page is intended to create a doctor-patient relationship, replace or be a substitute for a registered medical practitioner's medical treatment/advice or consultation. You should not use the information provided herein to diagnose, prevent, or cure a health problem. This information is solely intended to provide a general overview on the product and must be used for informational purposes only. Increasing your vitamin B12 intake can protect against deficiency to prevent these side effects.The information provided herein is supplied to the best of our abilities to make it accurate and reliable as it is published after a review by a team of professionals. Low levels of vitamin B12 can cause megaloblastic anemia, which is characterized by shortness of breath, headaches, and fatigue. If you’re low or deficient in B12, your healthcare provider will likely recommend oral vitamin B12 supplements or injections to increase your blood levels ( 10). ![]() That said, being low in vitamin B12 doesn’t always lead to megaloblastic anemia, and many people may only experience mild symptoms like fatigue ( 11).įurthermore, while a deficiency in vitamin B12 may not cause weight gain, it can decrease energy levels and contribute to fatigue, making it harder to stay active and manage your weight.Ĭonversely, some studies show that a deficiency in vitamin B12 may cause appetite loss, potentially leading to weight loss if left untreated ( 12, 13). Megaloblastic anemia can cause a variety of symptoms and side effects, including ( 10): Vitamin B12 helps your body use fat and carbohydrates for energy and make new protein. Further studies are needed to determine whether other factors may also be involved.Ī vitamin B12 deficiency can lead to megaloblastic anemia, a condition characterized by a low number of red blood cells that are larger than normal ( 9). Cyanocobalamin is a man-made form of vitamin B12 used to treat low levels (deficiency) of this vitamin. Vitamin B12 may play a vital role in your bone health. Some studies show that lower levels of vitamin B12 may be associated with a higher risk of overweight or obesity. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away: Upset stomach or throwing up. However, many people have no side effects or only have minor side effects. ![]() More research is needed to determine whether vitamin B12 directly affects body weight or BMI. What are some other side effects of Vitamin B12-Folic Acid All drugs may cause side effects. ![]() Therefore, it can’t be concluded that vitamin B12 causes weight loss. However, keep in mind that while these studies show an association between vitamin B12 status and body weight, they don’t take other potentially contributing factors into account. What’s more, a study in 256 children showed that children with lower levels of vitamin B12 tended to have a higher body mass index (BMI), which is a measure of body size determined by height and weight ( 8). Similarly, another study in 976 people showed that having low levels of vitamin B12 was linked to a higher risk of overweight or obesity ( 7). Interestingly, several studies have found that having adequate vitamin B12 levels may be associated with a lower risk of weight gain and obesity.Īccording to one large study in 9,075 people, having higher blood levels of vitamin B12 was associated with a lower risk of obesity ( 6). Some animal studies suggest that a deficiency in vitamin B12 may increase body fat percentage and alter metabolism. However, current evidence is lacking, and additional high quality studies are needed to determine how vitamin B12 may affect metabolism and body fat in humans. What’s more, one animal study showed that administering B vitamins to rats fed a high fat diet reduced weight gain and increased levels of several enzymes that influence metabolism, compared with a control group ( 5 ). One review concluded that vitamin B12 plays a key role in fat metabolism, noting that a deficiency could be linked to increased fat accumulation and obesity ( 3).Īnother animal study found that severe vitamin B12 deficiency led to a significant increase in body fat percentage and cholesterol levels in pregnant mice ( 4). Although research in humans is still very limited, some studies suggest that vitamin B12 could affect body fat and metabolism. ![]()
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