Thats sounds like some stroooong bro science. But im going to look into it lol
Ok some real science is here, educate yourself it took some time to gather the info.
https://en.wikipedia.org/wiki/Donkey_milk
In donkey mammary secretion, defatted or not, growth factors and hormones have also been determined. In detail, donkey mammary secretions contain human-like leptin at levels close to human milk (3.35 e 5.32 ng/mL milk).
[11]The bioactive peptides insulin like growth factor 1 IGF-1 ghrelin and triiodothyronine were also found in frozen donkey milk. These molecules, and many others present in human milk, are increasingly receiving attention from a nutraceutical point of view because of their potential direct role in regulating food intake, metabolism, and infant body condition.
[11]
IGF-1 is a primary mediator of the effects of
growth hormone (GH). Growth hormone is made in the
anterior pituitary gland, is released into the blood stream, and then stimulates the
liver to produce IGF-1. IGF-1 then stimulates systemic body growth, and has growth-promoting effects on almost every
cell in the body, especially skeletal
muscle,
cartilage,
bone,
liver,
kidney,
nerve,
skin,
hematopoietic, and
lung cells. In addition to the
insulin-like effects, IGF-1 can also regulate cellular
DNA synthesis.
[12]
Part of this signaling may be via IGF1R/Insulin Receptor heterodimers (the reason for the confusion is that binding studies show that IGF1 binds the insulin receptor 100-fold less well than insulin, yet that does not correlate with the actual potency of IGF1 in vivo at inducing
phosphorylation of the insulin receptor, and hypoglycemia).[
medical citation needed]
http://pathwaymaps.com/maps/723
Upon Insulin stimulation, mTOR phosphorylates Eukaryotic translation initiation factor 4E binding protein 1 ( 4E-BP1 ) leading to the formation of an active eIF-4F complex . The eIF4F complex is composed of Eukaryotic translation initiation factor 4E ( eIF4E ), the cap-binding protein, eukaryotic translation initiation factor 4 gamma, 1 -3 ( eIF4G1/3 ), a large polypeptide with binding sites for a number of other proteins, including eIF4E, and an ATP-dependent RNA-helicase Eukaryotic translation initiation factor 4A ( eIF4A ).
https://en.wikipedia.org/wiki/Eukaryotic_initiation_factor_4F