Phenyl-Free® 1

Phenylalanine-free, iron fortified infant formula with DHA and ARA for infants and young children with documented phenylketonuria (PKU).


Phenylalanine-free, iron fortified infant formula with DHA and ARA for infants and young children with documented phenylketonuria (PKU).

Product Forms

ProductFormatUnit SizeApproximate Product Yield at Normal DilutionShelf LifeItem Number
Phenyl-Free® 1Powder454 gYield Not Applicable to Metabolics18 Months2001922

Preparation Of Feedings


Mead Johnson Phenyl-Free® 1 is to be used only in the dietary management of infants and young children with phenylketonuria under the direct and continuing supervision of your baby’s doctor.

WARNING: This product is nutritionally incomplete. Care must be taken to provide enough phenylalanine to support growth, using other foods with phenylalanine as required. Your baby’s doctor must carefully and constantly supervise the use of Phenyl-Free® 1 with other foods and adjust the diet based on frequent blood tests.

Your baby’s health depends on carefully following the instructions below. Proper hygiene, preparation, dilution, use and storage are important when preparing formula. Powdered formulas are not sterile and should not be fed to premature infants or those persons who might have immune problems unless directed and supervised by your baby’s doctor.

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Preparation Description: 

1. Wash hands thoroughly. Boil clean bottles, nipples, caps, and utensils in water (2 minutes at a rolling boil).

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Preparation Description: 

2. Boil fresh water at a rolling boil for 2 minutes. Cool to room temperature prior to mixing.

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Preparation Description: 

3. Pour desired amount of the cooled water into the bottle. Add powder. Cap bottle and SHAKE WELL.


Analysisper 100 mLper 100 g
Energy (kcal/kJ)68/280500/2090
Protein equivalent (g)2.216.2
% of total energy1313
Source: Amino Acid Premix
Carbohydrate (g)6.951
% of total energy4040
Source: Corn syrup solids, modified corn starch, sugar
Fat (g)3.526
% of total energy4747
Source: Palm olein oil (44%), soy oil (19.5%), coconut oil (19.5%), high oleic sunflower oil (14.5%), ARA & DHA single cell oil blend (2.5%)
Linoleic Acid (g)0.544
Linolenic Acid (g)0.0460.34
ARA (mg)24175
DHA (mg)11.988
Calcium (mg)89660
Phosphorus (mg)59440
Phosphorus (mMol)1.9214.2
Magnesium (mg)8.966
Magnesium (mMol)0.372.7
Iron (mg)1.39.6
Zinc (mg)1.168.6
Manganese (mg)0.0510.38
Copper (mg)0.1160.86
Iodine (mg)0.01030.076
Selenium (mg)0.00190.0141
Sodium (mg)32240
Sodium (mMol)1.4110.4
Potassium (mg)76560
Potassium (mMol)1.9314.3
Chloride (mg)58430
Chloride (mMol)1.6412.1
Vitamin A (IU)2101520
Vitamin D (IU)51380
Vitamin E (IU)1.3510
Vitamin K (mg)0.00540.044
Vitamin C (mg)8.160
Thiamine (mg)0.1351
Riboflavin (mg)0.1351
Niacin (mg)1.3510
Pantothenic Acid (mg)0.513.8
Vitamin B6 (mg)0.1351
Folic Acid (mg)0.01350.1
Vitamin B12 (mg)0.000270.002
Biotin (mg)0.00510.038
Choline (mg)16.7124
Inositol (mg)11.686
Carnitine (mg)6.951
Taurine (mg)4.130
Other Characteristics
Potential Renal Solute Load (mOsm/100 mL)119.5
Osmolality (mOsm/kg H2O)*350
Osmolarity (mOsm/L)*320
Water (g/100 mL)90


Corn Syrup Solids, Vegetable Oil (Palm Olein Oil, Coconut Oil, Soy Oil, High Oleic Sunflower Oil), Amino Acids (L-Glutamine, L-Leucine, Potassium Aspartate, L-Lysine Hydrochloride, L-Tyrosine, L-Proline, L-Valine, L-Isoleucine, L-Alanine, L-Arginine, L- Threonine, L-Serine, Glycine, L-Histidine, L-Methionine, L-Tryptophan, L-Cystine), Modified Corn Starch, Sugar, Mortierella Alpina Oil, Crypthecodinium Cohnii Oil†, Ethyl Vanillin, L- Carnitine, Taurine, Ascorbyl Palmitate, Mixed Tocopherols (May contain Potassium Hydroxide), Minerals (Calcium Phosphate, Choline Chloride, Cupric Sulfate, Ferrous Sulfate, Inositol, Magnesium Oxide, Manganese Sulfate, Potassium Chloride, Potassium Citrate, Sodium Citrate, Sodium Iodide, Sodium Selenite And Zinc Sulfate), Vitamins (Ascorbic Acid, Biotin, Calcium Pantothenate, Folic Acid, Niacinamide, Riboflavin, Thiamine Hydrochloride, Vitamin A Palmitate, Vitamin B12, Vitamin B6 Hydrochloride, Vitamin D3, Vitamin E Acetate and Vitamin K1).

†A Source of Docosahexaenoic Acid (DHA)