can b12 injections cause stomach pain Are Vitamin Shots Right for You? Vitamin B12 Side Effects

Meghan, same exact issue here

Possible Side Effects Common (usually temporary and mild): Headache Mild fatigue Digestive discomfort (bloating, nausea) Mild increase in heart rate Rare: Skin irritation or redness at injection site Dizziness or jitteriness Temporary sleep disturbances Side Effect Management Stay hydrated and eat balanced meals during the protocol Reduce dosage if fatigue or nausea occurs Use smaller split doses if needed to increase tolerance Contraindications Do NOT use 5-Amino-1MQ if: You are pregnant or breastfeeding You have uncontrolled cardiovascular conditions You have liver or kidney impairment You are allergic to any excipients or BAC You are on medications that alter NAD metabolism without physician oversight Product Details 51MQ50 68 Items Specific References MPN 51MQ50 16 other products in the same category: Kisspeptin-10 10mg Kisspeptin-10, a neuropeptide regulating GnRH release, is central to reproductive function research

it can thus trigger a severe B12 deficiency

If oral supplements have not improved your symptoms, injection is almost certainly more appropriate for you