Iron Supplement

Al

At my son’s 9 month well check, I was told he was low in iron and it was suggested we give him an iron supplement like poly vi sol. I’m a little nervous after reading reviews so was wondering if there were any other brands that you’d recommend? He’s BF and eats table food twice a day. Some said the poly vi sol gave their babies upset tummies or made them fussy. My first son didn’t have this issue so I’m clueless.