"You could buy it from any different company, but they have to have the Magtein proprietary combination, because they're the only people that have the license to make L-threonate." Magtein says on its website that this product "may allow the elemental magnesium to cross the blood-brain barrier," and as such may help people maintain cognitive function and memory as they age
Injectable GHK-Cu just aren't that practical for most people evaluating GHK-Cu injection vs topical options
10.1016/j.fsi.2012.10.013 66 WangJ.LiuZ.HeX.LianS.LiangJ.YuD.et al (2018b)
Annu Rev Immunol, 12: 809-837
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Jutkowitz E, Gaugler JE, Trivedi AN, Mitchell LL, Gozalo P