Serving size of 1cup (28g) Cereals, fortified (ready to eat) has 0.400mg-3.600mg vitamin B6, which is 22-180% of the daily vitamin RDA for lactating women.
Cereals, fortified (ready to eat) can also be a good source for other priority 1 nutrients for lactating women such as Vitamin B12, “true” vitamin A (retinol), Vitamin B1, Vitamin B2, and vitamin E.
The vitamin content in each specific cereal can very largely, so pay attention to the manufacture food label for details.
Find a recipe with cereals here