Negative vs Positive Electrode: Vitamin C
Negative vs positive electrode: vitamin C is negatively charged, so polarity decides whether anything happens. Which water to use, and what to expect.
beauty-devices
Olive Young vs Daiso vs Duty-Free: What to Buy
Olive Young vs Daiso vs duty-free in Korea: a practicing doctor on what is worth buying in each, what to skip, and whether beauty devices do anything.