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The B12 provides its own separate benefits for energy and nutrient status, but the color itself has no pharmacological significance
Ingredients: Aqua (Deionized Water), Triticum Vulgare (Wheat Germ) Oil, Cetyl Alcohol, Stearyl Alcohol, Ceteareth-20, Propylene Glycol, Polyacrylamide, C13-14 Isoparaffin, Laureth-7, Isopropyl Myristate, Glycerin, Caprylic/Capric Triglyceride, Lecithin, Dimethicone, Copper Tripeptide-1, Xanthan Gum, Tetrasodium EDTA, Phenoxyethanol, Ethylhexylglycerin
They can state that glutathione 'supports antioxidant activity' or 'promotes cellular health' because those are structure-function claims permitted under 21 CFR 101.93
It's inconsistent retrieval practices
It is also a useful signal: a solution that loses its blue, turns green, or develops visible precipitate is indicating a change in the copper coordination state or the integrity of the complex