I have posted info about isoforms in one of our reports a long time ago... let me find it...
Here is the common info
And this is a screenshot from one of our reports, when we tested a lot oh HGH suppliers. as you see some of them do not have HGH at all and some of them use reduced isoforms, which are of course not as effective as HGH with 191 amino-acid-residues.
So, what does those numbers on Simec report means. Simec said:
In Pharma guidelines there are those specifications for somatropin for injection:
related proteins: not more than 13.0 %
related substances: not more than 6.0 %
related proteins are in fact also HGH but not as full as the main form, those molecules are different. other isoforms
related substances are bigger molecules (dimer and other) than somatropin.
As result we can state that Simec confirmed presence of real HGH in its isoform Nr.1 with 191 amino-residues.
as far as i understood other related substances are other not "full-valued" hgh-isoforms or even a bigger molecules, probably those, which were mentioned in Wikipedia.
So, purity of our HGH is within pharmaceutical standards... ok, 13.5 against 13.0 limit; 0,5% beyond the limit, but don`t forget about measuring deviations or himidity of samples, which could influence the final result. Considering HGH`s crazy molecular formula (C990 H1532 N262 O300 S7) and its measuring procedure (it took over 3 months at Simec to test it) I for sure consider it as a pass. its pharma-grade.