Benefits of Vitamin B12 Injections at Gruene House Med Spa Did you know all the great health benefits a Vitamin B12 injection can provide? It can also help you feel better in 24hrs #b12injections #vitamin #Vitaminb12 #Clinic #HurstTX Compounded Vitamin B Complex Injection Empower Pharmacy How Often Should You Have B12 Injections? A little insight to the importance of the b12 injections. My client hadn't been feeling well & had some bloods done with her GP. The results identified a severe deficiency in b12.