Learn more about strengthening brittle nails with vitamin B-7 (biotin), based on clinical evidence
The real variables are compound selection, source quality, and your individual health history
People with pre-existing macular edema or other retinal conditions need closer observation
HTH EDIT: I am pretty sure that small vial will only hold 4ml of bac stat water
The results reported significant main and interactive effects (at 5% and 1% probability levels) of species, water stress, melatonin, species water stress, species melatonin, water stress melatonin and species water stress melatonin on electrolyte leakage (EL), essential oil content (EOC), essential oil yield (EOY), oxidized glutathione (GSSG), total glutathione (GT), reduced glutathione (GSH), glutathione reductase (GR), and superoxide dismutase (SOD) (Tables 1 and 2)