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How can the hair protect the scalp from UV radiation?

UV radiation from the sun can be harmful to the skin, including the scalp. However, the hair provides a natural form of protection against these harmful rays.

1. Absorption

The hair shaft is made up of a protein called keratin, which has the ability to absorb UV radiation. When the sun’s rays hit the hair, some of the UV radiation is absorbed by the hair, preventing it from reaching the scalp.

2. Reflection

The hair also has a reflective property that can help protect the scalp from UV radiation. Light-colored or white hair reflects more UV radiation than dark hair, reducing the amount of radiation that reaches the scalp.

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3. Scalp Coverage

The hair provides physical coverage to the scalp, acting as a barrier between the sun’s rays and the skin. This coverage helps to reduce the direct exposure of the scalp to UV radiation.

4. Melanin Production

The hair follicles produce melanin, the pigment responsible for hair color. Melanin not only gives color to the hair but also provides some level of protection against UV radiation. Darker hair contains more melanin, which can help absorb and scatter UV rays, further protecting the scalp.

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5. Sunscreen Effect

Although not as effective as sunscreen, the hair can provide a certain level of protection similar to a physical barrier. It can help to reduce the intensity of UV radiation reaching the scalp, acting as a natural sunscreen.

While the hair provides some protection against UV radiation, it is important to note that it is not a foolproof method. It is still essential to take additional measures to protect the scalp, such as wearing hats or using sunscreen specifically designed for the scalp.

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