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The body has finite receptor capacity
utilizing these values can also help distinguish B12 deficiency from folate deficiency (with folate deficiency, MMA will be normal and homocysteine will be elevated) (6) Levels less than 200 pg/mL are considered deficient (2) Once deficiency is confirmed, it is important to address underlying etiology
Those with autoimmune conditions should monitor for any changes in symptoms, as immune modulation effects are not fully characterized
Vitamin B12 & Hair Growth: What To Know Before Supplementing. September 2025
Some people may not be suitable for B12 injections without further medical advice, depending on their medical history or allergy risk
Frequent comorbidities are rheumatological and cardiovascular in nature, in particular, psoriatic arthritis
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