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The HCG injections for fertility can be given either under the skin subcutaneously or into the buttocks intramuscularly depending on the doctors choice
It appears to rejuvenate aging cells by restoring youthful gene expression patterns
However, because B12 is stored in our livers, it might take a while for these deficiencies to show (Glass, 1959)
Dosage and frequency of injections can influence overall costs as well
Jeffers M, Schmidt L, Nakaigawa N, Webb CP, Weirich G, Kishida T, Zbar B, Vande Woude GF