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Every batch of Virtus Peptides tesamorelin is independently tested by ILS Laboratories (ISO/IEC 17025 accredited) across the full QC panel: purity and quantitation by HPLC, heavy metals by ICP-MS (lead, arsenic, cadmium, chromium, and mercury), bacterial endotoxin by USP , and a rapid microbial screen (DNA microarray)

[1] - [4] In vitro studies have highlighted the promising antimicrobial activity of Gly-His-Lys conjugates as candidates for further research into skin and tissue infections

Shukla D, Mandal PK, Ersland L, Gruner ER, Tripathi M, et al

As with all cosmetic ingredients, safety evaluation includes: Toxicological assessment Irritation and sensitisation review Stability and preservative efficacy testing Patch testing is advisable for new users, especially those with sensitive skin