folate comes in what mg
For cancer (general), 0.2-40 milligrams of folate or folic acid (either taken alone or in combination with aspirin, vitamin B6, or vitamin B12) has been taken by mouth daily for 3-8 years, with mixed results. For cognitive effects, 0.75-15 milligrams of folic acid has been taken by mouth daily for 1-36 months.
In addition, for severe folate deficiency, 1-5 milligrams has been taken by mouth daily until blood levels are corrected and documented by a qualified healthcare professional. For fragile X syndrome, 10-250 milligrams of folic acid has been taken by mouth daily for 2-8 months with a lack of effect on symptoms.