# How to Choose the Right Probiotic for Your Body
The probiotic aisle overwhelms most parents. Shelf-stable versus refrigerated. 10 billion CFUs versus 50 billion. With prebiotics or without. The choices feel endless, and marketing claims only add to the confusion.
Here's what matters: not all probiotics work the same way for every body. Your child's needs differ from yours. A probiotic that helps one family member with digestion might do nothing for another.
Start by understanding what you're actually buying. CFU stands for colony-forming units, the measurement of live bacteria in each dose. Higher CFU counts don't automatically mean better results. Research shows that strain matters more than sheer volume. Lactobacillus and Bifidobacterium are the most studied genera for children and adults alike.
Next, consider storage. Refrigerated probiotics maintain live cultures longer, though shelf-stable options work if kept in cool, dry places. Check expiration dates carefully. Dead bacteria can't help your gut.
The prebiotics question deserves attention too. Prebiotics feed beneficial bacteria, but they're optional if your family eats plenty of fiber from vegetables, fruits, and whole grains already.
Before buying any probiotic, identify your actual goal. Are you addressing constipation? Diarrhea? Immune support? Eczema? Different strains target different outcomes. Lactobacillus rhamnosus GG has strong evidence for diarrhea prevention. Bifidobacterium appears helpful for some digestive issues.
Talk with your pediatrician before starting a probiotic, especially if your child takes antibiotics or has a compromised immune system. Some probiotics interact with medications. Your doctor can recommend strains backed by research for your child's specific situation.
Quality matters