Muscle Stem Cell Rescue: It has been shown to rejuvenate senescent muscle stem cells (muSCs), restoring the regenerative capacity of aged skeletal muscle and significantly increasing grip strength and torque in animal models
Therefore, there is a very low risk of B12 toxicity, even at high doses like 1,000 mcg a day
Safety and effectiveness in pediatric patients have not been established

Groups at increased risk of B12 deficiency include: Vegans and strict vegetarians , who avoid all animal products and are at significant risk without supplementation or fortified foods Older adults , in whom reduced stomach acid production impairs B12 absorption People with pernicious anaemia , an autoimmune condition that destroys intrinsic factor-producing cells Those who have undergone gastric surgery , including bariatric procedures, which can reduce intrinsic factor availability Individuals taking long-term metformin for type 2 diabetes, as this medication is associated with reduced B12 absorption the MHRA has issued specific safety advice on monitoring B12 levels in this group [6] [7] People with conditions affecting the small intestine , such as Crohn's disease or coeliac disease Symptoms of B12 deficiency can include fatigue, weakness, pins and needles, memory difficulties, and a sore or inflamed tongue (glossitis)

The changes may feel subtle, such as steadier energy, improved focus, or better consistency during workouts
Definition Crohns disease is a chronic, relapsing-remitting inflammatory bowel disease (IBD) characterized by transmural (full-thickness) inflammation that can affect any segment of the gastrointestinal tract from the mouth to the anus