These vitamins repair worn out tissues in the body and therefore slow down the aging process. Foods rich in vitamin C help to increase collagen production, which helps to thicken the skin over time.  Foods that are rich in vitamin C include citrus fruits, oranges, kiwi fruit, broccoli, tomatoes and cauliflower. The daily requirement of vitamin C is 75-90 mg.  Foods that are rich in vitamin E are olive oil, avocados, broccoli, pumpkin, papayas, mangoes and tomatoes. The daily requirement is 15 mg.  Foods rich in vitamin A include oranges, pumpkin, sweet potatoes, spinach and carrots. The daily requirement for vitamin A is 700-900 mg. Water helps to remove waste products and toxins from the body, therefore revitalizing the skin. It also helps to improve skin elasticity and allows it to heal naturally.  Aside from drinking water, you can also improve your hydration levels by drinking herbal teas and eating fruit and veg with a high water content, such as watermelon, tomato, beets and celery. How much it benefits your skin to drink water is debatable, mainly because the water will reach your other organs before reaching your skin. However, while not everyone agrees that drinking more water will improve skin, others insist that it does, and it won't hurt. Supplement your diet with borage seed oil and fish oil. These help in strengthening collagen beneath the skin and in keeping the skin hydrated.  These oils are also rich in vitamin B3, which is important for healthy skin. One form of  vitamin B3 (known as niacinamide) may even help reduce wrinkles and improve skin elasticity. The recommended dosage of fish oil is around 1,000 mg, while the standard dosage of borage oil varies between 230 and 720 mg depending on age, sex, and manufacturer. Always check the manufacturer's instructions on any supplement you purchase since dosages may vary. Bone broth is a traditional food which is known to boost the immune system. It is an excellent source of minerals and gelatin. Bone broth also supports the joints, hair and skin...

How would you rephrase that briefly using Vietnamese?
Ăn thực phẩm giàu vitamin C và E. Uống ít nhất 8 cốc nước mỗi ngày. Bổ sung dầu hạt hoa lưu ly (borage seed oil) hoặc uống dầu cá. Uống nước hầm xương.