The Sugimoto 1995 study documented that copper ions inhibit type 1 5-alpha reductase by up to 90% in vitro, with 50% inhibition at 0.12 mcg copper/mL
Therefore, even though B12 may come in more concentrated dosages with oral administration, the IM shots still provide the best way to correct B12 deficiency
How Quickly Does a B12 Injection Work The Short Answer Most patients report feeling the effects of a B12 shot anywhere from 12-48 hours after treatment
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Ingredient Compatibility Chart The limited compatibility of GHK-CU with common skincare actives is its main drawback compared to second-generation formulations
Several factors can affect how quickly you respond, including the severity of your deficiency, your general health, and how your body processes the vitamin