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Injectable use has a growing body of anecdotal evidence and practitioner experience, though large-scale human trials for injectable forms are still limited
Otherwise, organ meats and seafoods are the best sources, followed by muscle meats, cereals and grains, although the selenium content of the latter varies widely with location, being towards or at the bottom of the range in the UK and Europe but at the top in North America, most notably in Canada (see Fig
It makes it a popular ingredient in products targeting skin lightening and the treatment of conditions such as melasma and hyperpigmentation disorders
For researchers who are uncertain which direction their research will take, starting with GHK-Cu 50mg and expanding later is often the most economical path
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