This article summarizes publicly reported information as of July 24, 2026 and is educational, not medical, legal, or financial advice
Scalp psoriasis can temporarily cause hair loss
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Injection site reactions, including redness, swelling, or itching, are usually unrelated to dose level and instead reflect injection technique issues or localized sensitivity
Expected Duration of B12 Injection Benefits The duration of vitamin B12 injection benefits can vary based on individual factors, but in general, the effects of a single injection can last for several weeks to several months