Having too little folate, known as a vitamin B9 deficiency or a folate deficiency, can affect your red blood cells and cause a range of health problems. Wondering how to spot a problem—and what ...

Severe deficiency can result in a condition called pellagra, with symptoms such as: Vitamin B9, also called folate, occurs naturally in foods. Folic acid is the synthetic form, often found in ...

Vitamin B12 or B9 deficiency happens when the body produces unusually big red blood cells that cannot function normally due to a shortage of vitamin B12 or folate. A chemical known as haemoglobin ...

For example, a vitamin B9 deficiency may cause headaches and heart palpitations while a vitamin B2 deficiency may cause cracked lips and hair loss. It is possible to have more than one B vitamin ...