I don't plan on giving my son cereal at all. There is no advantage to it. I know people who started it around four months (or earlier) because it makes babies sleep for longer periods. But that's because their stomachs can't process it, so it just sits there. :\
Yes unless the doctor says otherwise. I had to add it to my son's bottle at 3 months but that was because his reflux was so bad he was losing weight from spring up and he wanted to thicken the formula.
The issue is that Gerber wants your money and don't care about the potential harm to your child. Medical professionals who actually follow current guidelines will say not before 6 months. Research shows that rice cereal is not nutritionally beneficial at all.
Quoting Babygurl2409: I read an article for gerber babies and they said that 4 months was a good age to start and gerber is pretty well known but I thought I would ask on here as well