Non toxic prenatal pills

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Hey everyone! My name is Sandra, congratulations on your pregnancies =D I have been trying to avoid food additives for years now; and I have been having a difficult time finding a prenatal pill that doesn't contain food dye. Also, I have been reading that DHA in prenatal pills is made synthetically and therefore toxic. Has anyone heard about this? What pills do you take? Thank you sooooo much! =D