What is the difference between cyanocobalamin and methylcobalamin
In humans, B12 deficiencies are seen more commonly in people consuming a vegetarian or vegan diet who are not supplementing enough B12
For people without a deficiency, the evidence for additional benefit from injections is much weaker
This sensation, called paresthesia, can result from nerve involvement related to a B12 deficiency, often in the hands, legs, or feet
This classification means it has not undergone the safety and efficacy testing required of medicines
For example, older people (because absorption declines with age) and those with gut-related conditions such as celiac disease and Crohns disease may struggle to absorb enough vitamin B12 to stave off symptoms of a deficiency, says Foxx