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 ( Another animal study found that severe vitamin B12 deficiency led to a significant increase in body fat percentage and cholesterol levels in pregnant mice ( Whats 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 ( 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
Although these therapies are often discussed together, they work through very different biological pathways
It can also result in confusion and personality changes
A thicker needle is necessary for IM injections to penetrate the muscle tissue effectively
Key Takeaways MIC B12 injections before and after results vary depending on the patients baseline B12 levels, metabolic health, and adherence to nutrition and activity plans
The exact absorption rate is hard to predict, but this sustained release should help maintain steadier blood levels of B12