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HCY 1 – Iron-fortified infant formula and medical food powder for infants and toddlers

Iron-fortified infant formula and medical food powder that is for infants and toddlers with homocystinuria.


HCY 1 – Iron-fortified infant formula and medical food powder for infants and toddlers

HCY 1 is an iron-fortified infant formula and medical food powder that is free of the essential amino acid methionine for infants and toddlers with documented homocystinuria. The product provides all other essential amino acids as well as nonessential amino acids, carbohydrate, fat, essential fatty acids, vitamins and minerals. Use under direct and continuing supervision of a doctor.

Product Features:

  • DHA and ARA
  • Methionine-free
  • Added cystine
  • Vitamin and mineral levels meet the U.S. Infant Formula Act requirements per 100 Calories
  • Increased levels of B vitamins, compared to routine infant formulas, for cofactor production
  • Vanilla scent
  • Mixes easily and stays in suspension well
  • Has choline, an essential nutrient important for brain development and the normal functioning of cells1,2
  • Halal


Per 100 grams Powder
Protein equivalent, g16.2
Fat, g26
Linoleic acid, mg4000
Carbohydrate, g51
Vitamins/Other Nutrients
Vitamin A, IU1520
Vitamin D, IU380
Vitamin E, IU10
Vitamin K, mcg40
Thiamin (Vitamin B1), mcg1000
Riboflavin (Vitamin B2), mcg1000
Vitamin B6, mcg1000
Vitamin B12, mcg2
Niacin, mcg10000
Folic acid (Folacin), mcg100
Pantothenic acid, mcg3800
Biotin, mcg38
Vitamin C (Ascorbic acid), mg60
Choline, mg124
Inositol, mg86
Calcium, mg660
Phosphorus, mg440
Magnesium, mg66
Iron, mg9.6
Zinc, mg8.6
Manganese, mcg380
Copper, mcg860
Iodine, mcg76
Selenium, mcg14.1
Sodium, mg240
Potassium, mg560
Chloride, mg430

Product nutrient values and ingredients are subject to change. Please see product label for current information.

* WARNING: Protein is incomplete since it does not contain the essential amino acid methionine.

† Determined at 20 Cal/fl oz dilution.

Nutrient Facts

Protein Equivalent (% Calories)*13
Fat (% Calories)47
Carbohydrate (% Calories)40
Potential Renal Solute Load (mOsm/100 g powder)3144
Osmolality (mOsm/kg water)350
Osmolarity (mOsm/L)320
Lactose-freeSuitable for someone with lactose intolerance

* WARNING: Protein is incomplete since it does not contain the essential amino acid methionine.

† Determined at 20 Cal/fl oz dilution.


Ingredients: 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-proline, L-valine, L-isoleucine, L-alanine, L-arginine, L-threonine, L-phenylalanine, L-tyrosine, L-serine, L-cystine, glycine, L-histidine, L-tryptophan), modified corn starch, sugar, calcium phosphate and less than 1%: Mortierella alpina oil*, Crypthecodinium cohnii oil, ethyl vanillin, sodium citrate, potassium citrate, magnesium oxide, ferrous sulfate, potassium chloride, zinc sulfate, cupric sulfate, manganese sulfate, sodium iodide, sodium selenite), choline chloride, inositol, ascorbic acid, niacinamide, calcium pantothenate, vitamin B6 hydrochloride, thiamin hydrochloride, riboflavin, vitamin D3, folic acid, biotin, vitamin K1, vitamin E acetate, vitamin A palmitate, vitamin B12, taurine, L-carnitine.

* A source of arachidonic acid (ARA).

† A source of docosahexaenoic acid (DHA).

Amino Acid Composition

mg/100 g powder
mg/100 g powder
Aspartic Acid1300
Glutamic Acid2600

Preparation of Feedings


The baby’s health depends on carefully following the instructions below. Use only as directed by a medical professional. Proper hygiene, preparation, dilution, use and storage are important when preparing infant formula. Powdered infant formulas are not sterile and should NOT be fed to premature infants or infants who might have immune problems unless directed and supervised by a doctor. Discuss with parents which formula is appropriate for the baby.

Discuss with parents whether they need to use cooled, boiled water for mixing and whether they need to boil clean utensils, bottles and nipples in water before use.

The medical professional will provide instructions for the correct amounts of water and powder. Pour the required amount of water into the bottle/container. Add the correct amount of powder, cap the bottle/container and shake vigorously.

If instructed to use the scoop in the can, each unpacked, level scoop delivers approximately 4.5 g of powder. Store DRY scoop in can.

Failure to follow these instructions could result in severe harm. Once prepared, infant formula can spoil quickly. Either feed immediately or cover and store in refrigerator at 35–40°F (2–4°C) for no longer than 24 hours. Do not use prepared formula if it is unrefrigerated for more than a total of 2 hours. Do not freeze prepared formula. After feeding begins, use formula within 1 hour or discard.

WARNING: Do not use a microwave oven to warm formula. Serious burns may result.

Refer to the product label for the most accurate information.

CAUTION: Mead Johnson Nutrition HCY 1 is to be used only in the dietary management of infants and young children with documented homocystinuria while under direct and continuing medical supervision.

WARNING: This product is nutritionally incomplete. Care must be taken to provide enough methionine to support growth using other foods with this amino acid as required. Medical professionals must carefully and constantly supervise use of HCY 1 with other foods and liquids and adjust the diet based on frequent blood tests.

WARNING: Not for parenteral (I.V.) use.


  1. Food and Nutrition Board, Institute of Medicine, Choline. In: Dietary References Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline. Washington, DC: National Academies Press;1998:390-422.
  2. Zeisel SH, da Costa KA. Choline: an essential nutrient for public health. Nutr Rev. 2009;67:615-623.
  3. Fomon SJ, Ziegler EE. Renal solute load and potential renal solute load in infancy. J Pediatr. 1999;134:11-14.