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 This formula is a life saver!!! Oh wow, I don't even know where to begin. Our little boy was severe colic starting at 2 weeks old. Crying all day every day for 4 months straight, it was HORRIBLE.He was also having blood in his stool because he had a milk protein allergy that we didnt discover until he was about 4 months old. We tried 6 different formulas and Similac Soy was our seventh formula. And FINALLY the blood in his stool stopped and after a few days of being on it, he was SO much happier and actually sleeping. A completely different baby!!! I can't thank Similac enough for making this saved our sanity, which sounds dramatic, but if you've ever had a colicky baby you know what I'm talking about. If you're baby has a milk protein allergy, try this formula!! I know most babies allergic to milk are also allergic to soy, but not ours. In fact, he couldn't even tolerate all of the hypoallergenic formulas. This formula is a LIFE SAVER!!! We are happy and our baby is happy!!
Date published: 2017-06-17
Rated 5 out of 5 by from Love this formula My son is 4 weeks old and he was eating Gerber Goodstart Gentle and he was spitting up all of it half an hour after feedings. We switched to Similac Isomil and he didn't have any trouble! He loves it and he isn't fussy especially during the nighttime feedings. It's easy on his tummy as well.
Date published: 2017-06-15
Rated 5 out of 5 by from Finally a formula that worked for my daughter I try similac advance, total comfort, sensative. I got frustrated because nothing seem to in till ER recomended similac soy and thanks god it work. I will like some samples or coupons since im a single mother. Thank you similac soy.
Date published: 2017-06-06
Rated 5 out of 5 by from This product is awesome Your product helped my son he is less fussy
Date published: 2017-06-02
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
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