prompt: Why does the sun make our hair lighter but make our skin darker?
chosen: Why does the sun make our hair lighter but make our skin darker?
chosen: user
chosen: The sun makes our hair lighter because it increases the amount of melanin production. When exposed to UV light, melanin acts as a protective pigment, absorbing and dispersing the energy from the sun’s rays. It is this process that helps us produce a suntan. However, this same process results in our skin darkening because the melanin absorbs UVB radiation that causes skin damage and prevents us getting sunburned.  Ultimately, sun exposure helps both our hair and skin in different ways and it is our natural defense against the sun’s rays.
chosen: assistant
rejected: Why does the sun make our hair lighter but make our skin darker?
rejected: user
rejected: assistant