Vitamin B12 injections are intramuscular preparations of cobalamin
Any deficiency in vitamin B12 hampers hair growth and leads to potential hair loss in individuals
Deficiency can occur in certain populations, including older adults, vegans, individuals with pernicious anaemia, those with malabsorption disorders such as Crohn's disease or coeliac disease, people who have had bariatric surgery or gastrectomy, and those on long-term medication such as metformin or acid-suppressing drugs
Hormone Research , 53(6), 274-278
Some equine injections may have mild side effects, such as temporary swelling or discomfort at the injection site
Other digestive disorders such as Crohns disease or Celiac disease may also lead to vitamin b12 deficiency