Yes, it is safe for infants to eat multiple foods and allergens at one time. Our Stage 1 Mix-Ins gradually introduce peanut, egg, and milk one-at-a-time because those are the top 3 allergens that make up 80% of all childhood food reactions. Tree nuts, sesame, soy, and wheat make up less than 10% of food allergies, so many parents prefer to introduce them all at once to simplify their baby’s diet and reduce the amount of time spent on introduction.Other Ready. Set. Food! products, like Stage 3 Mix-Ins, Organic Baby Oatmeal, Organic Puffs, and Organic Oat & Fruit Bars, contain up to 9 of the top common allergens, and are designed to follow the introduction of the top 3 allergens in Stage 1 Mix-Ins. If your preference is to introduce all common allergens at once, you can incorporate our allergen-inclusive foods into your baby's diet for easy and convenient sustained exposure once you've introduced each allergen. If your preference is to introduce allergens one at a time, you can still use Stage 3 Mix-Ins and other products to easily maintain your baby’s exposure to these allergens. Babies who are introduced to allergens but don’t eat them regularly are still at risk of food allergies. One at a time or all together, our products are here to help introduce, maintain and grow your little ones' exposure to all of these allergens early and often in an effort to set them up for a future to enjoy all kinds of foods.