can you feel tired after a b12 injection Feeling tired, low on energy or struggling with brain fog? β‘οΈπ Vitamin injections help support your body from the inside out, giving that extra boost when you need it Vitamin B12 Deficiency: Symptoms, Causes
Description
Successful absorption requires the successful completion of several different steps: The stomach secretes a special molecule called intrinsic factor for the sole purpose of facilitating absorption further down the digestive tract
Please consult your physician before beginning any treatment or therapy program

Yes, they can
Mannitol and carboxymethyl cellulose are common additives that may cause acute reactions
10.1089/ars.2016.6755 36 GiulianteR.SartiniD.BacchettiT.RocchettiR.KltingI.PolidoriC.et al (2015)