ghk-cu recommended dosage injection subcutaneous Peptides Before and After: Dosage, Benefits & How It Works for Skin and Hair GHK-CU Peptide Dosage: Complete Guide
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[DOI] [PubMed] [Google Scholar] Tohyama Y, Sikiri P, Diksic M

There were moving and beautifully written parts of this book

The same source also indicates that injectable B12 reliably restores levels when oral absorption is impaired

Because B12 is absolutely essential for the synthesis and maintenance of myelin, a deficiency can lead to the demyelination of the very autonomic nerves responsible for baroreceptor function

Effects in active malignancy are not well characterized, and most clinicians treat this as an exclusion until more data exists
A couple of 'things'': it is possible to have anaemia and haemochromotis at the same time (though you don't have a low Hb), there are conditions called iron out of balance and functional iron deficiency (associated with low or dropping ferritin), which can be caused by autoimmune disease, PA, absorption problems, coeliac disease, absorption problems and issues to do with gene mutations (HFE gene, mutations C282Y, H63D, and S65C) - and many other things as well