Severe allergic reactions to B12 shots are uncommon but can happen
Your provider will review medical history, current medications, allergies, endocrine concerns, metabolic risks, pregnancy or breastfeeding status, and contraindications before making any recommendation
No clinical trials have evaluated their combined use, and major US guidelines do not recommend lipotropic injections
If you follow a strict vegan or vegetarian diet, getting enough B12 from food alone can be a real challenge
In contrast, oral vitamin B12 supplements need to pass through your stomach acid and digestive system, and their absorption can be less reliable, especially if there are absorption issues