Well I agree and disagree with other posters. My iron was and is very low also. I went on Floradix three times a day with a Vit C tablet for a month and my iron rose by 1 point! (Obviously nowhere near enough) I still take the Floradix and it doesn't cause constipation but I also have to take iron tablets as well. I tried a number and they caused bad constipation and I tried to manage it until I found iron piccolinate tablets which causes v little constipation. Const. is a nuisance but low iron levels are not good for your health and wellbeing and you will only suffer if you don't increase your levels. I get health palpitations from low iron and you prob already know about the tiredness. Make sure you keep your levels monitored. Talk to your chemist and GP about what you can take for constipation in preg and b/feeding as this can be managed whereas iron levels are much harder to deal with.