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Potential Benefits & Side Effects Evidence tier: a single ex-vivo / in-vitro study for AHK-Cu, class-level animal data for GHK-Cu, and no human trial by any route
When Oral Supplements Are Sufficient: Mild Deficiency Cases: Dietary insufficiency without absorption issues Preventive supplementation Cost-conscious approach No underlying digestive problems Recommended Dosage: 250-1000 mcg daily for maintenance When B12 Injections Are Superior: Severe Deficiency or Absorption Issues: Pernicious anemia Digestive disorders affecting absorption Rapid correction needed Previous failed oral supplementation The Science: Intramuscular B12 injections bypass the digestive system entirely, providing 100% bioavailability compared to 1-5% from oral supplements in deficient individuals
In the commonly accepted sequential model: Adipose triglyceride lipase (ATGL) initiates hydrolysis of triglyceride to diacylglycerol
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Both methods effectively raise B12 levels, but they do so in different ways
