Those ads make me soooo mad...they are emotional blackmail, pure and simple. Even though I FF my kids, I never used toddler milk - on the whole, it is unnecessary. If you b/f and don't want to stop at 12 months, don't. If you FF and don't want to switch to cows milk just yet, you can continue to use infant formula, just don't let it replace food. The formula companies pay big dollars to ad agencies to devise the best way of blackmailing parents into believing that they will be disadvantaging their child if they do feed him or her toddler formula. They do it because they are not allowed to advertise infant formula. And the claim that a certain brand of toddler milk will 'support' their immune system is utter bulldust.