65 to 90 milligrams Too much vitamin C the extra is just flushed through your body unnoticed 65 to 90 milligrams Too much vitamin C: Is it harmful? - Mayo Clinic Mayo Clinic www.mayoclinic.org Too much vitamin C: Is it harmful? - Mayo Clinic 65 to 90 milligrams mayoclinic.org fruits and vegetables High doses 65 to 90 milligrams Is It Possible To Take Too Much Vitamin C? Mayo Clinic 65 to 90 milligrams Too much vitamin C mayoclinic.org