[DOI] [PMC free article] [PubMed] [Google Scholar] 35.Foyer C.H., Noctor G
What this implies: if the vial remains sealed, in a cool, dry, dark place (ideally under refrigeration or freezing, with minimal humidity), you can reasonably expect 2-3 years of viability in the lyophilized state
But if you are layering a lot of products, you could be sealing the HA under heavier layers that might actually clog pores, such as oils or thick creams
Vodicka P, Vodenkova S, Danesova N, et al
Is Neurobion injection IV or IM
Plasma glycerol levels were determined enzymatically using a glycerol phosphate oxidase assay kit and measured with a spectrophotometer