B7 (biotin) - Biotin is closely related to the health of our hair, skin, and nails, and without enough of it, the following symptoms and health problems may occur:
- Hair loss, or alopecia
- A scaly, red rash around the eyes, nose, mouth, and genitals
- Depression
- Lethargy
- Hallucinations
- Numbness and tingling in the hands and feet
- A loss of control of bodily movements, known as ataxia
- Seizures
- Impaired immune function
- Increased risk of bacterial and fungal infection
B9 (Folate or Folic Acid) - Vitamin B9 deficiency or folate deficiency may lead to high homocysteine levels, which have been linked to heart disease and stroke, and put you at an increased risk for cancer. Additionally, folate deficiency in pregnant women has been linked to birth defects.
B12 (Cobalamin)- While most common in older adults, anyone can experience vitamin B12 deficiency. The most common signs and symptoms of vitamin B12 deficiency include:
- Fatigue
- Shortness of breath
- Diarrhea
- Nervousness
- Numbness
- Tingling sensation in the fingers and toes (neuropathy)
- Nerve damage can occur in severe cases
The most common cause of vitamin B deficiency is the low levels of B complex vitamins in a personal diet, although there are several other health reasons that one may become vitamin B deficient. Those who have atrophic gastritis, pernicious anemia, Crohn's disease, celiac disease, or are drinking heavily have a harder time digesting and properly absorbing B vitamins, and thus are more likely to become deficient. Additionally, those with immune system disorders, or are taking certain diabetes and heartburn medications are also more likely to develop signs of vitamin B deficiency.
If you're experiencing one or more of the complications we mentioned above, contact your doctor or healthcare provider. They may order a blood test if you're experiencing symptoms of anemia, which is linked to low levels of vitamins B12 and B9.