Yes, low B12 can indirectly affect weight loss by causing fatigue, weakness, and impacting metabolism, which makes exercise harder and slows calorie burning, though it's not a direct weight loss aid and research on a direct link to weight gain/loss is mixed. Deficiencies can disrupt fat metabolism and affect appetite hormones, potentially stalling efforts, but fixing low levels primarily restores normal function, helping you exercise and eat better.
But no. Vitmain B12 has no effect on weight loss or weight gain. The same holds true for other vitamins and minerals. No vitamin or mineral is capable of inducing a change in body weight status single handedly. If it was the case , no one in this world would've been overweight.
There's no solid proof that vitamin B-12 shots, also called injections, help you lose weight.
Contrary to common assumptions, Vitamin B12 deficiency doesn't directly lead to weight gain. However, it can indirectly influence weight through its impact on energy metabolism. Insufficient B12 can lead to fatigue and weakness, which may reduce physical activity levels and, in turn, lead to weight gain.
For B12, it is recommended to take a daily dose of 2.4 mcg for adults. Most people receive this amount of intake if they follow a healthy diet. Even if you're using vitamin B12 to help you lose weight, it is best not to overdo it as there are side effects of upping the dosage.
The worst symptoms of B12 deficiency involve severe neurological damage, including severe memory loss, confusion, dementia, psychosis, hallucinations, balance problems, trouble walking, and irreversible nerve damage (neuropathy), alongside serious mental health issues like severe depression or irritability, with physical signs including extreme fatigue, pale skin, and a sore, smooth tongue. These severe cognitive and neurological issues are the most concerning because they can become permanent if left untreated.
These shots can start to work right away. Often, people will notice the effects of B12 injections within 24 to 72 hours after their first dose.
B Vitamins for Weight Loss
B vitamins are essential for a healthy metabolism. They help convert food into energy and are crucial for metabolizing glucose, fatty acids and amino acids. Studies have found that B1, B2, B6, and B9 are linked to lower levels of obesity, smaller waist circumference and less visceral fat.
B12 deficiency can trigger specific food cravings, most notably for meat, fish, or eggs, as the body seeks animal-based sources to replenish the vitamin, especially in those on vegetarian/vegan diets or older adults. While cravings for sugary or salty foods can also signal general B-vitamin issues, the distinct urge for protein-rich animal products is a key indicator, but professional testing is crucial for confirmation.
Cutaneous manifestations associated with vitamin B12 deficiency are skin hyperpigmentation, vitiligo, angular stomatitis, and hair changes. A diagnosis of vitamin B12 deficiency is often overlooked in its early stages because these signs are not specific to vitamin B12 deficiency alone.
Jinous Samavat comments, “Taken together, our data indicate that low B12 levels can impair fat cell metabolism, which may lead to increased fat accumulation, impaired fat metabolism and inflammatory damage, all of which predispose to weight gain.”
According to research, low B12 doesn't directly cause weight gain but creates metabolic conditions that make weight loss significantly harder. The deficiency impacts insulin resistance, metabolic syndrome markers, and adipocyte differentiation—the process by which cells become fat cells.
Some of the ways she's lost weight include walking, eating more protein, and medication to help with how her body processes food. Clarkson started some of these changes to her diet and exercise routines when she moved to New York City, where she hosts "The Kelly Clarkson Show."
The 3-3-3 rule for weight loss is a simple, habit-based method focusing on three key areas: 3 balanced meals a day, 3 bottles (or ~1.5L) of water by 3 PM, and 3 hours of physical activity per week, aiming for consistency over complex diets. It simplifies fat loss by establishing rhythm through consistent eating, adequate hydration to support metabolism, and regular movement, promoting sustainable health without intense calorie counting or restrictive rules, says Five Diamond Fitness and Wellness, Joon Medical Wellness & Aesthetics, and EatingWell.
Vitamins and minerals can aid in weight loss and reducing belly fat. Critical nutrients highlighted include Vitamin D for lower body weight, Vitamin B12 for energy metabolism, magnesium for fat metabolism, calcium for reducing fat storage, and Vitamin C for enhancing fat oxidation levels during workouts.
feeling weak or tired. diarrhoea. a sore or red tongue, sometimes with mouth ulcers. problems with memory, understanding and judgment (cognitive changes)
Before starting the Vitamin injections I will make sure to tell my Physician if I am pregnant, lactating or have any of the following conditions.
When will I feel better? Hydroxocobalamin starts to work straight away. However, it may take a few days or weeks before your vitamin B12 levels and symptoms (such as extreme tiredness or lack of energy) start to improve.
If you have vitamin B12–deficiency anemia, you may have the typical symptoms of anemia at first, such as fatigue, paleness, shortness of breath, headaches, or dizziness. If left untreated, you may start to notice brain and nervous system symptoms.
The foods highest in Vitamin B12 are animal products, with clams and liver (beef, lamb) being exceptionally rich sources, often providing several hundred percent of the daily value in a single serving, alongside seafood like mussels, sardines, and salmon, dairy, eggs, and fortified cereals and nutritional yeast for vegans.
The Boots Vitamin B12 Blood Test Kit checks your vitamin B12 levels, using a finger-prick blood sample. Use of this kit requires internet access. All personal data in relation to this product, services and online platforms are collected and processed by MyHealthChecked.
But what many people don't know is that vitamin B12 also plays a role in weight management, so if you're low in B12, it could be making it extra hard to reach your weight loss targets.
Vitamin B12 deficiency anaemia is usually treated with injections of vitamin B12, called hydroxocobalamin. At first, you'll have these injections every other day for 2 weeks or until your symptoms have started improving. Your GP or nurse will give the injections.