 Eligible infants whose parents consent for participation will be randomized to one of the two study regimens. Sealed envelopes containing the subject treatment group will be prepared from randomization schedules that are computer-generated using a pseudorandom permuted blocks algorithm. Multiples will be randomized together to the same treatment group. The randomization will be block stratified by birth weight 500-1000g and 1001-1500g. Infants will have laboratory values to follow for signs of metabolic acidosis and nutritional status. These labs BMP, Magnesium, Phosphorous, Alkaline Phosphatase, and prealbumin will be drawn on study days 1, 15, and 30. Total blood volume for these labs is approximately 1.4 mL, and may be obtained by venipuncture or heel stick. These labs are monitored for nutritional sufficiency in very low birth weight infants already, the only change will be the timing that the labs are obtained. 