Plants do not provide vitamin B12, so a plant-based vegan or vegetarian diet is likely to be deficient in this important vitamin
Switching to preservative-free formulations typically resolves the issue for people who need b12 but react to standard preparations
Limit processed foods and added sugars
Feel Bad After B12 injection Hey, So i had a B12 injection today at 11.30
This combination could be especially helpful for: Adults over 40 who are noticing early signs of aging, such as dull skin, fatigue, weight gain, slower metabolism, brain fog, or reduced recovery

Some symptoms of vitamin B12 deficiency include: Weakness and tiredness Pale or yellowish skin Loss of appetite Heart palpitations Mouth or tongue soreness Tingling or "pins and needles" sensation in your hands and feet Shortness of breath Dizziness Blurry vision Mood swings or personality changes You are more at-risk for developing vitamin B12 deficiency if you are: Pregnant Over 65 Vegan Take medicine for diabetes Take medicine for heartburn Have had surgery to remove part of your bowels Medically Reviewed on 6/23/2026 Mayo Clinic: "Vitamin B-12." National Institutes of Health: "Vitamin B12." Oregon State University: "Vitamin B12." Top What Happens if You Take Too Much Vitamin B12 Related Articles 22 Healthy Foods High in B VitaminsAny deficiency of B vitamins can lead to various health conditions