what is better than glutathione for skin whitening Which Treatment Best Permanently? Glowing, Not Whitening: The Glutathione
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doi: 10.1186/s12944-019-1150-0 113

Keep the pen in the refrigerator with the cartridge installed but the needle removed

Routes reported in the literature include intraperitoneal, subcutaneous, intramuscular, intravenous, and oral administration
Figure 20: Photograph of Ivan Lefkovits (left) with his wife and fellow scientist Hana (middle) and Jerne (right), taken at the Paul Ehrlich Institute in Frankfurt (credit: Lefkovits, 1996)