B12 Vitamin Injection for Hair Loss Hair Loss Studios Vitamin B12 Deficiency and Hair Loss: What's The Connection? Good Health by Hims A vitamin B12 injection is a shot that delivers B12 directly into your muscle, helping your body absorb it quickly (especially if your body struggles to absorb it from food or tablets) Vitamin B12 is important for healthy hair growth because it supports cell division and oxygen supply to hair follicles. When B12 causes hair fall Hair fall can occur if there is Vitamin B12 Vitamin Injection for Hair Loss Hair Loss Studios