Common signs include: Ongoing fatigue or weakness Pale skin Numbness or tingling in the hands and feet Brain fog, forgetfulness, or trouble concentrating Low mood, anxiety, or irritability Poor appetite or digestive upset When B12 is low, your metabolism slows, you have less energy for activity, and appetite signals can get thrown off, all of which make weight loss harder
Losing weight can be challenging, and its even more difficult when nutritional imbalances stand in your way
Sleep disturbances, including insomnia or vivid dreams, have been reported by a small percentage of patients
Side effects are rare and usually mild, such as slight pain or redness at the injection site
Cyanocobalamin can also help with these issues, but its need for conversion may delay clinical response in some people