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Description
10.1136/bmj.i4919 54 SterneJ

Otherwise deficiency can be treated with vitamin B12 supplements, B12-fortified foods and natural B12 food sources

10.1080/10245332.2018.1456023 52 SharabiA.CohenE.SulkesJ.GartyM

Outcome signal Cosmetic support Evidence cue Skin and hair research Decision rhythm Start / Compare / Explore Best-fit signals Choose GHK-Cu Topical Serum when these match your goal Decision timeline What to expect as you compare GHK-Cu Topical Serum Timelines vary by goal, dose, baseline health, and consistency
