Folic acid is the synthetic form of B9 and Folate is also known as vitamin B-9.

Folic acid is the synthetic form of B9, found in supplements and fortified foods, while folate (Note: Folate is also known as vitamin B-9) occurs naturally in foods. 

All the B vitamins are water-soluble, meaning the body does not store them. 

Folic acid is crucial for proper brain function and plays an important role in mental and emotional health.

http://umm.edu/health/medical/altmed/supplement/vitamin-b9-folic-acid

.================

Folate is also known as vitamin B-9. 

It is found naturally in foods.

Folic acid is the synthetic form of folate, found in supplements and also added to processed, or “fortified,” foods. 

The term folate is often used to describe both natural and synthetic versions.


http://www.healthline.com/health/food-nutrition/folate-folic-acid

.================