Your provider determines the route and site at intake
If folate deficiency is suspected, it is reasonable to give oral folic acid (0.4 1 mg/day) without doing laboratory investigation for deficiency at least until the hemoglobin and mean corpuscular volume normalizes (or longer if the underlying cause cannot be eliminated)
But, its important to check the exact concentration of your shot
You can also prepare a natural hair mask by mixing yoghurt with Vitamin B12 supplements (after consulting a healthcare provider)
Safety depends on the ingredients, your health conditions, and whos administering them
A: A vitamin B shot, most commonly referring to a B12 injection, is an intramuscular injection that delivers a concentrated dose of B vitamins directly into your bloodstream, bypassing the digestive system