Wich milk? Human milk?
Hormones do not bind to your blood. Every hormone has a specific receptor in the body. Blood is responsible for transportation.
For example, cortisol crosses cell membranes and acts on a glucocorticoid receptor, present in the nucleus and cytoplasm. Free testosterone is transported to the cytoplasm and binds to the androgen receptor. Insulin receptors belong to a family of growth factor receptors that have tyrosine kinase activity.
Each hormone has different characteristics as to its form of synthesis, storage, half-
life, blood transport form and mechanism of action.