For injectable users, especially those using GHK-Cu long-term, periodic blood work makes sense
Deficiencies can occur with medical conditions such as atrophic gastritis (which causes thinning of the stomach lining), pernicious anaemia, Crohns disease, celiac disease, lupus, or other immune system disorders and certain medications
Those who attempt to shed pounds and maintain a healthy liver may benefit from this
More on this: Vegan and vegetarian sources of B12 To diagnose a vitamin B12 deficiency, doctors A doctor may order blood tests if they suspect a person has a vitamin B12 deficiency, including a complete blood count and tests to check levels of B12 and folate in the blood
Xiao W, Jiang W, Chen Z, Huang Y, Mao J, Zheng W