probiotic-rich foods. Your gut is your second 'brain'; when sugar, antibiotics, and other things destroy good bacteria, it can create food allergies (via a progression of untreated Candida), IBS, fatigue, and a host of other problems. If you only take one supplement, take a good probiotic.
I get asked all the time — “What vitamins should I choose for my kids?” I hesitate to recommend store-bought vitamins in any form because even the good ones have some ‘extra’ ingredients in them. Instead try these homemade gummy vitamins -- NO powders required!