Also, its best to call a doctor in case of the following: Heart problems
So, when you gorge on pizza, you can thank your B vitamins for helping to break it down
A febrile response (transient fever) may occur if aseptic technique isnt followed

You're a strong candidate for B12 injections if you experience any of the following: Persistent fatigue that sleep doesn't fix Brain fog, forgetfulness, or trouble concentrating Low mood, anxiety, or stress that feels disproportionate to what's happening Weight gain or difficulty losing weight despite consistent effort Tingling, numbness, or weakness in hands or feet (signs of B12-related neuropathy) Frequent colds, slow healing, or post-COVID fatigue A plant-based, vegetarian, or vegan diet Age 50 or older (B12 absorption naturally declines with age) A history of gastric bypass, Crohn's disease, celiac disease, or chronic acid reflux Long-term use of metformin (for diabetes), proton pump inhibitors (Prilosec, Nexium), or H2 blockers (Pepcid, Zantac) An MTHFR gene variant or known methylation issue A history of B12 deficiency, pernicious anemia, or low folate Hormonal shifts: perimenopause, menopause, postpartum If you fit one or more of these, a vitamin B12 shot is one of the lowest-risk, fastest-acting interventions available

Here are the basic needs of vitamin B12 over the years in the average person: Up to 6 months old: 0.4 mcg 7 months to a year old: 0.5 mcg 1-3 years old: 0.9 mcg 4-8 years old: 1.2 mcg 9-13 years old: 1.8 mcg 14 years old and above: 2.4 mcg Pregnant women: 2.6 mcg Breastfeeding women: 2.8 mcg If you deal with fatigue all the time and youre experiencing many of the other symptoms listed, a B12 shot may be what you need