Any suggestions on the dose of Vitamin B9 (folic acid)?
I would first add up what you take with current vitamins and food (if possible-use online diet references for major things you eat or drink and look for a listing of the top foods with folate / folic acid).
I would take a supplement that uses Metafolin, which is an active form. Folic acid can build up and cause problems for some who can’t convert it well or at all.
I have Solgar 800 mcg tablets that I would break down to 1/4 (200 mcg), but I am taking a multivitamin with enough in it, now.
I’ve read you don’t typically need 400 mcg or more a day. I specifically do not eat foods or supplements with much or any folic acid in them, anymore.