Guiness is alcohol and for me alcohol in pregnancy is out completely. I have heard that the 'occasional drinks' we are told won't hurt can actually cause restlessness and sometimes behavioural problems in children such as ADHD. If it is iron you are after, it is in a better form in green veg and some cereals. Just my opinion though, and I'm sure if it was one of my cravings, I probably would give in to the odd sip lol!