Generally, melanin can be lightened by reducing the intake of food containing metal elements, staying away from computer radiation, ensuring sufficient sleep, and preventing the aging of the skin stratum corneum. Here are some specific methods:

1. Reduce the intake of food containing metal elements

Foods rich in metal elements such as copper, iron, and zinc can directly or indirectly increase the quantity and activity of substances related to melanin production, such as tyrosine, tyrosinase, and dopaquinone. Therefore, these foods often become the root cause of skin darkening. Such foods mainly include animal liver, animal kidneys, oysters, shrimp, crabs, beans, walnuts, black sesame seeds, raisins, etc.

2. Stay away from computer radiation

Computer radiation, air conditioning, and skin aging in daily life can all cause skin dryness, leading to a decline in skin quality and resulting in dull skin. Skin whitening and moisturizing have always been closely related. Only hydrated skin can present a whiter glow. Skin with insufficient moisture has poor metabolic ability, which can lead to decreased skin repair function and cause dark skin.

3. Ensure sufficient sleep

During nighttime sleep, the skin is in its best state of repair. Only by ensuring good sleep can the skin's metabolism be smoother and the skin appear whiter. Poor rest and insufficient sleep not only affect health but also slow down blood flow to the skin, cause vasoconstriction, blood stagnation, and turn the skin grayish-black.

4. Prevent aging of the skin stratum corneum

There is a layer of stratum corneum on our skin, which is like a double-edged sword. While it serves as a protective membrane to protect the skin from external damage, it can also cause dullness and loss of radiance in our skin color due to aging or residual build-up on the skin.