b12 injection rash from How Vitamin B12 Deficiency Triggers Panic Attacks Injection Site Reaction to Extended-Release

[22] [18] Pseudovitamin B 12 is the majority corrinoid in spirulina, an algal dietary supplement sometimes erroneously claimed as having this vitamin activity

These injections are commonly used to improve mood and energy levels, balance hormones, and support healthy skin, hair, and nails

Oral vitamin B12 therapy

For others, it can take longer, especially if symptoms have been present for months or if there are multiple contributing factors (iron, vitamin D, thyroid issues, sleep, stress, etc.)

The aim is to restore vitamin B12 to a healthy level and then maintain it safely. Doctors usually determine dosage based on blood test results