Gold Member Badge


  • You're all caught up!

How to Know If You Are Low on Vitamin B

author image Stephanie Romo
Stephanie Romo has been a freelance writer since 2010. She writes about fitness, health and nutrition for several websites. Romo is an American Council of Exercise-certified personal trainer and has earned a Bachelor of Science degree in kinesiology with an emphasis in clinical exercise science from California State University, Fullerton. Romo currently is working on a second degree in nursing.
How to Know If You Are Low on Vitamin B
Vitamin B supports nervous system function and enhances skin and muscle tone. Photo Credit: Stockbyte/Stockbyte/Getty Images

Vitamin B complex includes vitamins B1, B2, B3, B5, B6, B7, B9, and B12. Each B vitamin has its own purpose in the body, and deficiency in any of the B vitamins can manifest as symptoms that range from barely noticeable to blindingly obvious. While the most accurate way to determine if you suffer from a vitamin B deficiency is through a blood test, you may also tune in to some important clues that your body may be giving you.

Video of the Day

Symptoms of Vitamin B Deficiency

Step 1

Pay attention to the way your body feels. Feeling sluggish and lethargic or exhibiting skin tone that is more pale then usual are two hallmark signs of vitamin B12 anemia. Vitamin B12 plays a large part in the production of red blood cells, and when this vitamin is deficient, your red blood cell count will usually decrease. When red blood cells are low, oxygen is not sufficiently circulating, leading to low energy, fatigue, and pallor of the skin.

Step 2

Determine if your B vitamin levels are lacking by assessing appetite. Low levels of vitamin B3, also known as niacin, can cause a decrease in hunger. This vitamin is important in the metabolism of protein and carbohydrates, as well as circulation, insulin production, and regulation of certain hormones. Besides lack of appetite, niacin deficiency can also cause mouth sores, dizziness, and headaches.

Step 3

Check for signs of irritability, nausea, acne, or loss of memory. Vitamin B9, better known as folic acid, is an important vitamin that can decrease in cases of alcoholism, malnutrition, and even aging. If you are experiencing any of these symptoms, visit your doctor as soon as possible, as folic acid deficiency can lead to potentially serious medical conditions, such as infertility or an increased risk of atherosclerosis

Step 4

Assess nervous system symptoms including presence of confusion, difficulty walking, leg cramps, or tickling or burning in the legs and feet - symptoms that are associated with a deficiency of thiamine, vital to brain and nervous system function. See your doctor as soon as possible if you experience any of these symptoms; If not corrected, thiamine deficiency can lead to coma and possibly death.

Step 5

Visit your primary care practitioner, who can run tests to verify or rule out a vitamin B deficiency. If you are deficient, your doctor will either prescribe a vitamin B supplement, or may refer you to a dietitian that can recommend foods that are rich in the B vitamins.

LiveStrong Calorie Tracker
Lose Weight. Feel Great! Change your life with MyPlate by LIVESTRONG.COM
  • Gain 2 pounds per week
  • Gain 1.5 pounds per week
  • Gain 1 pound per week
  • Gain 0.5 pound per week
  • Maintain my current weight
  • Lose 0.5 pound per week
  • Lose 1 pound per week
  • Lose 1.5 pounds per week
  • Lose 2 pounds per week
  • Female
  • Male
ft. in.



Demand Media