copper peptide ghk-cu hair growth clinical study humans trial human ghk cu randomized (2016) — Research Summary GHK-Cu Peptides Before and After:

Limited long-term safety data

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$182 Our Tesofensine research products are provided in a tabulated format, packaged in HDPE containers, protected with sterile cotton, sealed in a sterilized environment both at the cap and vacuum sealed on the outside for safety and protection during transit and storage

Not sure what you mean when you say 'the methyl was more active'...methylcobalamin is no more 'active' than any other form of cobalamin

The good news is that there is no report of B12 toxicity which means there is no limit to how much B12 can be taken by an otherwise healthy person