The key difference between ferrous sulphate and folic acid is that ferrous sulphate is a type of iron that is useful in treating and preventing iron deficiency anemia, whereas folic acid is a type of vitamin B that is useful in treating and preventing folate deficiency anemia. Ferrous sulfate can be defined as aous type of iron supplement consisting of a range of salts. Folic acid is a type of vitamin B, which is also known as folate. Anong supplements po ba binigay ni OB mo sayo mi? Nung preggy ako itake "Fortifier FA" meron n syang folic acid at ferrous sulfate at the same time. anemic po kasi ako.