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 (prepared as directed)*

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 from Keeps my babies fed! Both my children had problems with spitting up the entire contents of their stomachs at birth. Breastmilk, normal formula, and sensitive formulas didn't work. Soy, however, made the spitting up nearly stop.
Date published: 2017-05-13
Rated 5 out of 5 by from After trying many similac formulas this one worked best for my baby. For the first 3 months we had a difficult time soothing our fussy baby. During those 3 months we visited his pediatrician many times because we didn't know what was wrong with our baby. During that time we tried many Similac formulas (Similac Advance, Similac Sensitive, Similac Total Comfort, and Similac Alimentum) until we found the formula that soothed his tummy problems. The last formula that we tried was Similac Soy and that was the one that worked for him. He is now 7 months and is still drinking Similac Soy. He is a happy baby now! Thank you Similac Soy!
Date published: 2017-05-12
Rated 5 out of 5 by from Slow start but best option!!!! Our Daughter got constipated but only for a short time (soy can gum up the works), However after the initial getting used to the new formula period it has been a godsend!!
Date published: 2017-05-07
Rated 2 out of 5 by from Made my baby consitpated I switched formulas thinking that my 2 month old was lactose intolerant. She's been on the similar soy for 3 weeks and it made her very constipated. We now use the advance.
Date published: 2017-05-02
Rated 5 out of 5 by from Great features It did wonders for my sons stomach issues!
Date published: 2017-05-02
Rated 5 out of 5 by from Had to change to soy The transition was smooth with no hiccups
Date published: 2017-04-19
Rated 4 out of 5 by from Great product I'm a mother of two. Both babies started on a different brand and had bad gas and fussiness. Their doctor switched them to isomil and we never looked back!
Date published: 2017-03-31
Rated 1 out of 5 by from Too many bubbles I have a premature baby and I tried this formula because I was noticing she was having a lot of stomach pain due to gas. Our pediatrician recommended this formula and so we thought great until we made our first bottle and had seen how bubbly it was and thought to ourselves how is this going to help with gas and too much air. Needless to say we did let her have that bottle and it did not seem to help. I'm not sure how to post a picture but I do have one of how bubbly it was.
Date published: 2017-03-27
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