Vitamin B12 Injections vs. Oral Supplements: Which Is Better? Vital Force IV Therapy What are vitamin injections? Vitamin injections deliver essential nutrients directly into the body, meaning faster absorption compared to oral supplements Popular options include: B12 for energy Vitamin C Frontiers Efficacy of sublingual and oral vitamin B12 versus intramuscular administration: insights from a systematic review and meta analysis Vitamin B12 Deficiency? Heres the best way to treat it!, Many people take oral or sublingual tablets, but they may not always be effective especially if absorption is poor., The active injectable