can you be allergic to b12 injections itchy skin after Been on T for 5 weeks, all sites suddenly (in the past few days) became red and : r/ftm What Happens When You're – Vitamin B12 Injections vs. Oral

There is no need to take very high doses of vitamin B12

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If you feel worse before you feel better, dont be discouraged

This can increase your energy and metabolism, which may indirectly help you with weight loss when combined with a healthy lifestyle

This is known as atrophic gastritis and results in ineffective transport and absorption of vitamin B12 from dietary sources[1]