Similac® Soy Isomil®

Complete nutrition for sensitive tummies

Fussiness and gas can be a common part of feeding your baby.

Similac Soy Isomil is specially designed to comfort with the gentleness of soy to soothe the tummy.

Soy-based formulas have been clinically shown to help reduce feeding problems. No other soy-based formula has been studied more than Isomil.

Has OptiGRO to support your baby's brain and eye development.

If your baby’s fussiness or gas seems excessive, ask your physician about switching to Similac Soy Isomil.

Soy formulas are not recommended for premature infants with birth weights of less than 1800 g.

Similac Soy Isomil formula product for infants

Available In:

Similac Soy Isomil 1.45lb formula for infants 1.45-lb Powder

Similac Soy Isomil 12.4oz formula for infants 12.4-oz Powder

Similac Soy Isomil 32oz formula for infants 1-qt Ready to Feed

Nutrition Information

Powder / 1.45 lb

Serving size: 100 Cal*

Amount per serving

  • Calories:


  • Volume, mL:


  • Protein, g:


  • Fat, g:


  • Carbohydrate, g:


  • Water, g:


  • Linoleic Acid, mg:


Vitamins & Minerals

* Nutrient values are applicable when prepared as directed.

Similac® Soy Isomil®
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Rated 5 out of 5 by Amazing product When my son was born we tried Enfamil because everyone said that was the best; well not for us. He would cry non stop so we switched to Similac Advance and he was way better until his eczema started to flair. So, we tried the Isomil and that was it, my son took to this product very well. We love this product and are still using this product and will continue to buy this product with the next baby! February 5, 2016
Rated 3 out of 5 by Helped by didn't... Hi I used this product for my 2 month old daughter after using enfiml enfacare. This product is every good however it made her constipated plus she was still colicky but it worked for her eczema. Its just seems to be a huge trail and error game. However this product works great just not for my little buttercup. February 5, 2016
Rated 5 out of 5 by My son LOVES this formula The regular similac and enfamil were way to hard on my sons stomach but when we tried this he felt so much better! He can't get enough of this formula February 3, 2016
Rated 5 out of 5 by Love it and so does my baby Only product that worked. Happy January 31, 2016
Rated 4 out of 5 by Good Product We basically have used this product from birth with no issues. My twin daughters are now 8 months old and I am curious if there is a stage 2 in the Soy or what could be recommended as an option for a Stage 2 or are we fine feeding this until 12 months. I do however wish I got more coupons as a mother of twins... January 29, 2016
Rated 1 out of 5 by This product makes my baby constipated My baby is in pain every time he has a bm this product seems to make his still too hard but hes lactose intolerant so we have to give him soy January 27, 2016
Rated 5 out of 5 by Most gentle on baby's tummy! After trying different levels of formula and different brands the Similac Soy Isomil has by far been most gently for our baby. The leading competitor's soy based formula still caused painful gas for our baby so we gave it one last shot with the soy formula trying the Similac Isomil and thankfully our daughter can now be fed and pain free afterward! January 23, 2016
Rated 5 out of 5 by Great Alternative for Gassy Baby The soy based formula helped my baby relief the gas building up in his stomach. This product is great! January 15, 2016
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