The best defense against darkened skin is preventing it in the first place, and a proper diet is one of the best ways to do this. Eating the right foods will keep your whole body healthy, and a healthy body means healthy skin.  Eat the rainbow. To get the most vitamins and minerals possible from your diet, eat fresh fruits and vegetables of all colors. Consume foods that are high in vitamin C, which will help keep your skin more toned and elastic.  Drink enough water. Water is important for a healthy body and skin, but too much can also be dangerous. The best rule of thumb with water consumption is to listen to your body: if you’re thirsty, drink water.  Don’t shy away from healthy fats like avocado. Not only do our bodies need fat to survive, but our skin also needs it to be healthy and vibrant.  Choose fresh, homemade meals over processed foods or take-out. One of the biggest contributors to darkened skin is exposure to UVA and UVB, because the skin produces more melanin to protect itself, and more melanin means darker skin. The best way to protect yourself from the sun is to avoid it, but if that’s not an option, make sure you:  Wear sun-protective clothing, including gloves when driving. Use sunscreen or sunblock, especially on your hands and feet. Choose makeups and lip protection that have an SPF rating. Darkened skin can also be caused by things like dirt, exposure to the elements, and infections, so keeping the skin on your hands and feet clean and protected is essential to healthy skin, and will help prevent skin darkening and damage.  Avoid coming into contact with harsh chemicals if possible, as these can damage your skin. Be cautious and selective about manicures and pedicures, as improperly sterilized equipment can cause fungal infections.

How would you rephrase that briefly using Vietnamese?
Ăn uống điều độ, đủ dưỡng chất. Bảo vệ làn da khỏi ánh nắng mặt trời. Chăm sóc bàn tay và bàn chân.