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 Health News Exercise Underwhelms as a Hip Arthritis Treatment, Review Concludes Tongue Pacemaker Might Improve Sleep Apnea Patients' Health People Living Longer, But Spending More Years With Illness And Disability Measles Cases Set 35-Year US Record With Months To Go In 2026 GLP-1 Use Surges Among Young People With Obesity More Health News 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

Understanding safety starts with understanding what each does and what typical tolerance looks like
Encourages better sleep, mood regulation, promotes healthy skin and nails
It represents a fundamental evolution in how metabolic medicine approaches obesity
Ideally , antiseizure medications would be added simultaneously, combining steps #1 and #2 into a single step
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