Vitamin B9, more commonly known as folate (naturally-occurring form of B9) or folic acid (a synthetic form),is a water
soluble vitamin that is part of the B vitamin family.  B vitamins and folate help support adrenal function, help calm and
maintain a healthy nervous system, and are necessary for key metabolic processes.  Folate occurs naturally in foods
while folic acid is the synthetic form of folate.

Vitamin B9 is essential for human growth and development,  encourages normal nerve and proper brain functioning,
 may help reduce blood-levels of the  amino acid homocysteine (elevated homocysteine levels have been implicated
in increased risk of  heart disease and stroke). Folic acid or folate may also help protect against cancers of the lung
colon and cervix, and may help slow memory decline associated with aging.