blankty, the vast majority of parents have children that refuse new foods, go through phases or eating little etc etc. This is normal childhood behaviour just like tantrums, refusing to get hair brushed etc is absolutely normal. So yes, of course, I've been through this with my kids. But just like the tantrums, the sleepless nights, the potty training and everything else you go through as a parent you don't give in to your kids and you get through it. There are very few children who remain fussy where parents model healthy eating, encourage good eating and ignore fussiness etc. and often children who are extremely faddy or dangerously underweight have psychological problems of which food refusal is just a symptom.
So no I wouldn't give in to my children's faddiness for fear of them being malnourished because no normal child will starve themselves and pandering to fussiness is only going increase the problem.
I understand that worrying your child will be undernourished is a very powerful maternal urge. I continued breastfeeding both my dds well after I wanted to stop because they refused to take a bottle and, of course, when I eventually did stop they took to the bottle when they got hungry enough. Because no child will starve itself.
In cultures where food is scarce you don't get faddy children.
As is well known food refusal is rarely anything to do with taste and everything to do with control and attention and neophobia.
This is evidently the case where children have been eating fine and suddenly start refusing it. Proves it's to do with psychological development just like they can allow themselves to be dressed until the age of 2 and suddenyl start screaming when you try and do it etc.
Obviously individual children have individual tastes as adults do, but that's not what's being discussed here.