Your glutathione vial is not a bad batch. Glutathione dissolves at 20 to 50 mg mL. When you add 2mL of water to a 600mg vial, that is 300 mg mL. The powder physically Amazon.com: BB LAB Glutathione White Film 320mg*30pcs, Korea Glutathione Direct Film, Quick Absorption, Oral Dissolving Film, Contain Vitamin C : Health & Household Common Glutathione Mistakes People Make And Why They Quietly Sabotag Tvamm Elixirs Source Naturals Glutathione, Reduced 50 mg 100 tablets The Organic Market Reduced L Glutathione Plus (50 Caps) Buffered Setria USP Grade Enhanced Absorption Theranaturals