Certain health conditions such as intestinal or stomach problems, poor nutrition, cancer, HIV, pregnancy, old age, veganism and alcoholism can cause vitamin B12 deficiency
Others, like peptides that mimic or block prolactin effects, change libido via dopamine-prolactin balance
Some researchers use both, with GHK-Cu providing broader regenerative effects and AHK-Cu targeting hair specifically
The number 157 refers to the specific 15-amino-acid fragment within that parent protein
In Queensland, it is prohibited to purchase and possess peptides without a prescription, or to sell or supply them, without lawful authority