how often to get vitamin b12 injections Should You Injections? How Often Should You Have

Overdoing it can occasionally lead to side effects like nerve irritation (with too much B6), skin flushing (from high-dose B3), or digestive upset

John DiBella Published: November 3, 2025 Fact-checked by Dr

Oral supplements: can work for mild deficiency and maintenance in people who absorb B12 normally, but tend to take longer and are less reliable when absorption is impaired

Clinicians should be aware of potential interactions with narrow therapeutic index drugs that depend on rapid absorption (e.g., oral contraceptives, levothyroxine, warfarin) and may need to adjust timing or monitoring accordingly

If you have been on a consistent dose and suddenly notice that your tirzepatide is not working anymore , several factors could be responsible

Many of these contain B12, B6, or folic acid, which arent ideal for your bodys needs