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 Amazing This formula helped tremendously. She went from constipated, fussy, and gassy to a happy healthy baby within 10 hours
Date published: 2017-10-18
Rated 5 out of 5 by from Very helpful for my son's twin boys I had always given my children soy formula after breastfeeding for a couple of months due to the amount of allergies in our families. It was the best formula for them. When my son & his wife recently had twins she decided to breastfeed and give formula to supplement. They tried one brand and then switched to Similac Pro Sensitive, but there were some issues. The twins were continuously spitting up and sometimes it would be chunky. From the beginning I had suggested they try the soy formula.They just turned 3 months and they finally decided to go with my suggestion. What a huge difference it has made with the babies. Less fussiness and way less spitting up. I think they wish they had taken my advice from the beginning.
Date published: 2017-10-08
Rated 5 out of 5 by from Only Formula we could use This is by far the best formula out there!
Date published: 2017-10-02
Rated 5 out of 5 by from Breast feeding life saver! My sweet little angel is 16 days old today. After a whole week of exclusively breast feeding and no sleep we figured out she has a dairy sensitivity. I've had to cut out all dairy from my diet to be able to continue feeding her partially. Similac soy has made it possible for me to feed her while my body is cleansing from all the dairy and is gentle enough for her to finally be able to sleep. We could not be happier with the results and the product.
Date published: 2017-09-30
Rated 4 out of 5 by from This product helped my baby We started off with regular similar formula but quickly learned our little princess has a lactose intolerance and switched to soy. It took over a week to finally get adjusted with her stool back to normal, less fussiness and trapped gas. But I’m so glad we figured the problem out so quickly and was able to fix it.
Date published: 2017-09-29
Rated 5 out of 5 by from Gentle on Baby's Stomach We tried all the samples our doctor gave us including the other brands, but found our baby has some milk sensitivity and switched to soy. She spits up less than before, and her fussiness is in check! My friend recommended it and I'm glad she did!
Date published: 2017-09-27
Rated 3 out of 5 by from This product is very good, but.... This product seems to be working as far as the frequent spiting up. However, every time I give my grandson a bottle, he has runny stool. What should I do?
Date published: 2017-09-22
Rated 5 out of 5 by from It is AMAZING. After, trying several different ones. This one is the ONLY one that been great. No spit up and NO diarrhea. GREAT PRODUCT! After trying several different Similac's and several different Geber and Enfamil. Similac Soy is amazing. She immediately started to feel better. She doesn't spit up at all and she doesn't have diarrhea at all like she was with all the rest. Similac has always been my brand but, I didnt know what to do when she couldn't keep down the Advance or the Sensitive.
Date published: 2017-09-18
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