Wanna get specific? Here's a list of breast milk's ingredients.

According to Harvard Medical School's Intelhealth website, newborn babies gain about 15 pounds in the first year of life. One half of this weight gain takes place within the first four months of life. This growth spurt requires more energy than any other growth period throughout infancy or childhood. The child's nutritional needs for this time can be met completely by either breast milk or infant formula. Solid food cannot be consumed at this point, because baby's intestinal and renal systems are not fully mature.

Baby needs the perfect nutrients found in breast milk to replinish nutritional stores that have been depleted in gestation. Most importantly, the baby needs fat, protien, and iron.

Because breast milk contains lower levels of phosphorus, sodium, potassium, protien, and calcium, human milk is much easier on baby's digestion system, which helps to prevent dehydration.

What nutrients does my breast milk contain?

• Casein
  The fancy word for the special protien found in human breast milk that helps to preven gastroenteritis, respiratory infections, otitis media, some cancers, juvenile diabetes, and allergic reactions.
• Iron There is the perfect amount of iron for baby in mother's breast milk. Although cow's milk and infant formula contains more iron that breast milk, the human milk iron is abosorbed more efficiently by the baby.
• Lactose
  Mother's milk has a high concentration of lactose, which helps to absorb much-needed iron.
• Vitamin C
  Also aids in the iron-absorption.
• DHA
  Docosahexaenoic acid encourages brain development and stimulates vision.
• Lipase
  This fatty acid found in human milk contributes to how baby digests and abosorbs fats.
• Lactase
  Aids lactose absorption. Both the central nervous system and "intestinal flora" are boosted by the high contents of digestible lactose found in breast milk.
• Amylase
  Contributes to the digestion of starches.