👉 The word "which oil" typically refers to a specific type of oil, such as coconut oil or avocado oil, that contains certain compounds that increase the level of melanin in hair. Melanin is a pigment found in the skin that helps to protect us from the sun's UV rays and keep our skin healthy. When we don't use sunscreen correctly or when we burn, melanin can accumulate in areas of the skin that normally aren't covered by a layer of fat, leading to斑点或色素沉着（melanoma）。 However, if we regularly apply excessive amounts of oil on our face and hair, especially if it's not applied correctly, this can lead to the accumulation of excess melanin and make us look older, which is why some people choose to use oils like coconut or avocado oil specifically designed for hair growth and pigmentation. It's important to note that while these oils may help to increase the level of melanin in your hair, they should always be used with caution and under professional guidance. It's also important to keep in mind that while these oils can be good for our skin, they don't replace proper sunscreen use or any other protective measures against sun exposure.
