Vitamin B12 deficiency in African American and white octogenarians and centenarians in Georgia
Multiple studies have since been conducted to understand the full action of the peptide, especially in the area of healing gastrointestinal ulceration, which is elaborated on below
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A 2025 meta-analysis of 16 studies involving 6,098 participants found no statistically significant difference between intramuscular, oral, and sublingual B12 supplementation routes
The human tripeptide GHK-Cu in prevention of oxidative stress and degenerative conditions of aging: implications for cognitive health