Study: Breast Feeding No Better Than Bottle Feeding For Kids’ Health

[pnwmom]

72. Babies are still "infants" when they're 4, 5, and 6 months old. Even older.

And, ideally, babies are supposed to be exclusively breastfed until they're 6 months old.

Those proteins that have direct protective effects against infection continue throughout lactation, though depending on how much milk the baby is still consuming, s/he will receive less as time goes on.

Also, lysozyme is an antibody. Your conversations with your experts have left you uninformed. If you could prove your opinions with links, I'm sure you'd have done that by now.

dictionary.com

in·fant
noun
1.
a child during the earliest period of its life, especially before he or she can walk; baby.

http://en.wikipedia.org/wiki/Lysozyme

Lysozymes, also known as muramidase or N-acetylmuramide glycanhydrolase, are glycoside hydrolases. These are enzymes (EC 3.2.1.17) that damage bacterial cell walls by catalyzing hydrolysis of 1,4-beta-linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues in a peptidoglycan and between N-acetyl-D-glucosamine residues in chitodextrins. Lysozyme is abundant in a number of secretions, such as tears, saliva, human milk, and mucus. It is also present in cytoplasmic granules of the polymorphonuclear neutrophils (PMNs). Large amounts of lysozyme can be found in egg white. C-type lysozymes are closely related to alpha-lactalbumin in sequence and structure, making them part of the same family. In humans, the lysozyme enzyme is encoded by the LYZ gene.[1][2]

http://www.antibodies-online.com/abstract/Lysozyme+(LYZ)+ELISA+Kit/

Lysozyme (LYZ) ELISA Kit Abstract
LYZ encodes human lysozyme, whose natural substrate is the bacterial cell wall peptidoglycan (cleaving the beta[1-4]glycosidic linkages between N-acetylmuramic acid and N-acetylglucosamine). antibodies-online currently ships Lysozyme (LYZ) Antibodies (158), and to destinations worldwide.