Journal of Clinical Endocrinology and Metabolism, 106(2), 388-396
Older adults, vegans, individuals with gastrointestinal conditions, and those taking metformin or proton pump inhibitors often require higher doses or supplementation
The liver benefits from GHK-Cu exposure as well, and this is where the story comes full circle
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Individuals who follow a strict vegan diet are at a higher risk since they exclude animal products such as meat, fish, eggs, and milk, which are rich sources of B12
doi: 10.4103/1735-5362.278716 116