A deficiency can affect the nervous system and cause sensations such as numbness or tingling in the hands, feet, or legs
Despite the fact that SARMs tend to be selective, some of them may cause serious side effects

ESCs are derived from epiblast of the blastocyst from which many tissues of embryo arise, whereas ASCs are localized in adult organs [Table 2] where these cells function to replace damaged cells during tissue regeneration.[26,27] SCs are further classified into four types based on their transdifferentiation potential which include totipotent, pluripotent, multipotent and unipotent SC.[24] ESCs are known to have totipotent and pluripotent in nature and have the ability to differentiate into cells of three germ layers endoderm, mesoderm and ectoderm.[28] ASC is multipotent and can give rise to differentiated cells of anyone germ layer.[29] Unipotent SCs arise from multipotent cells and are dedicated to differentiate into specific type of tissue, for example, precursors for cardiomyocytes present in human heart or satellite cells characteristic for skeletal muscles are dedicated to differentiate into specific tissue.[30] Table 2
Methyl-B12 is the main form that is used within the body
If androgenic miniaturization is your primary driver (which it is for most men and a significant portion of women with pattern hair loss), GHK-Cu alone is not sufficient