Here's why:
* Natural hair color is determined by melanin: Melanin comes in two forms: eumelanin (brown/black) and pheomelanin (red/blonde). You can't change the type of melanin you produce naturally.
* Sun exposure can lighten hair, but not turn it red: Sun exposure can bleach hair, making it lighter, but it won't create a red hue.
* Certain foods and supplements don't change hair color: While some foods and supplements are good for hair health, they don't alter hair color.
If you're looking for red highlights or a reddish tint, you'll need to use hair color products:
* Hair dye: This is the most common and effective way to get red highlights or a red glaze. There are many different shades of red dye available, so you can find one that suits your preferences.
* Toner: This is a temporary color that can add subtle red tones to your hair. It's a good option for those who want a more natural-looking red.
Remember: Always use hair color products with caution, and follow the instructions carefully. It's also a good idea to consult with a professional stylist if you're unsure about how to achieve your desired color.