Hormones in generally, yes.
Here are some of the growth factors in milk:
- bombesine(a neuropeptide)
- GRP (Gastrin-releasing peptide)
- substance P (a neurotransmitter)
- CGRP (calcitonin-gene-related peptide, also a neurotransmitter)
- IGF-1 (Insulin-like growth factor-1)
- EGF (Epidermal growth factor)
- NGF (Nerve growth factor)
- PRP (Prolactin-releasing peptide
- LHRH (or: GnRH, stimulates secretion of LH and FSH)
- peptide YY
- peptide histidine methionine
- neuropeptide Y (stimulating appetite)
- TRH (stimulating TSH secretion) TRH stimulates prolactin- and GH secretion, through T3.
- TSH (stimulating T3- and T4 secretion)
- T3 (Triiodothyronine) T3 increases the number of estrogen receptors, increasing estrogen-influence.
- GHRF (Growth-hormone-releasing factor) GHRF stimulates GH- and (through GH) IGF-1 and –2 secretion
- ACTH (regulating cortisol secretion)
- insuline (regulating blood-glucose level)
- beta-endorphine (opioid peptide)
- small opioid peptides
- benzodiazepine-agonist peptides (neurotransmitters)
Peptides are small protein fractions that are not completely broken down into amino acids.
Growth factors are peptides that can be taken up into the bloodstream.