I give it to my DS1 because he has a really small appetite and hardly eats anything. When he's ill, he eats even less. My Mum and MIL both suggested it and normally I'd disagree with anything they suggest on principle but sometimes, I feel it helps with DS1's appetite and for boosting his iron levels. Could be wrong but he's very tall, within the right weight centiles and seems to have enough energy. You could have a chat with the pharmacist about it and then go armed with information to your Mum!