Effects of low vitamin B

Different B vitamins support different processes. Low vitamin B12 or folate may contribute to tiredness, weakness, breathlessness on effort, a sore tongue or changes in blood cells. B12 deficiency can also cause tingling, numbness, balance problems or memory changes because nerves may be affected. Low B6 may be linked with skin changes, a sore mouth or altered sensation. These symptoms can have other causes, so a blood test and a review of diet, medicines and health history help clarify the picture. During pregnancy, nutritional needs change and an identified deficiency deserves timely clinical advice.

Arrange an appointment if symptoms persist, recur or interfere with daily life. A clinician may check blood counts and vitamin levels, then recommend a food-based change or a supplement suited to the specific deficiency. Do not take high-dose supplements without advice, because treatment differs between vitamins and some products can affect test results or interact with medicines. Include foods such as eggs, dairy products, fish, meat, beans, lentils, leafy vegetables and fortified foods according to your dietary pattern. If you are pregnant, mention this before starting any supplement.

Seek prompt medical advice for new numbness, weakness, walking difficulty, confusion, marked breathlessness, chest discomfort or fainting. Contact your maternity team promptly if you are pregnant and have severe weakness, worsening breathlessness or difficulty eating and drinking. Urgent assessment is needed for sudden one-sided weakness, trouble speaking or a sudden change in alertness.

Which vitamin is low, and what test confirmed it? Could a medicine, digestive condition or dietary restriction be contributing? What dose and duration of treatment do you recommend, and when should levels or symptoms be checked again?