good post, its also important to avoid PUFA fats especially fried, these are known to cause oxidative stress to your body and it messes up with your thyroid and in general with your hormonal system, this is especially sensitive during puberty since your hormonal system is already having a party and your body has a hard time adapting and balancing the new levels of hormones, for boys its also very important to eat natural anti aromatese foods, since the spike in their testosterone triggers a spike in estrogen too, foods like celery, mushrooms, broccoli and also carrots can help.