1, it is recommended to take it twice a day: because VC is a water-soluble vitamin, it will be excreted with body fluids after 3-4 hours. Repeated supplementation at intervals of 3-4 hours can ensure the content of VC in the body and the absorption effect will be better.

2. Eat after breakfast or lunch: fruit is "gold in the morning and silver at noon", and so is VC, especially some VC products extracted from natural fruits, which should be eaten at breakfast or lunch, and the effect will be good. In the long run, it is difficult to whiten.

3, daily intake 100 mg: VC can not be excessive intake for a long time, because it is easy to cause oxalic acid or uric acid stones. However, from the maintenance point of view, it is recommended to take about 100 mg every day, which is safe and effective and will not produce so-called side effects.

4. Be sure to choose natural products: there are many VC products on the market, several or a dozen, but generally these products are synthetic VCs. Only truly natural VC can be called "natural vitamin C". Natural VC contains vitamin P, which can prevent VC from being damaged by oxidation and help VC to be better absorbed by human body. But the cost of synthesizing VC is low, and the general dosage is relatively high. For example, some VC effervescent tablets contain 1000 mg of VC, which generally belongs to the category of drugs and is not recommended for long-term use.

5, taking cycle: whitening is like a war, games with melanin need a steady supply of bullets, otherwise the melanin that has just been repelled will quickly cheer up and have stronger combat effectiveness. Oral administration for at least 3-6 months, the effect will be more obvious, because it is absorbed by the human body through the stomach, and it takes a process to help cells update step by step and improve skin color from the root. Any behavior that exaggerates the publicity effect is not good for health.