glutathione and vitamin c skin whitening cream Original Glutathion Extra Face Brightening With 50ml Rivaj

APLB Тонер для лица Glutathione Niacinamide 160 мл — купить, цена в Москве

Jiang, T., Liu, S., Cao, S

Rivaj

VARIANTS:BMRS Milky HYA with Ceramide + Niacinamide SOAP 70g each

Example 1: dissolving 0.54g of copper acetate in 20ml of distilled water, adding 1.02g of GHK tripeptide under the stirring condition, stirring at room temperature (generally specified as 30 ℃) for reaction for 3 hours, filtering, concentrating, adding 1ml of diethylamine, stirring for 30 minutes, adding 90ml of ethanol to precipitate a solid, filtering, washing a filter cake with distilled water, dissolving in 10ml of distilled water, adding 0.13ml of glacial acetic acid, stirring for reaction for 1 hour, concentrating and freeze-drying to obtain 0.905g of GHK copper peptide complex with the purity of 98%, the yield of 72%, the acetic acid content of 16.1% and the copper content of 10.6%