Improving Skin Quality (Skin Whitening Section)
Some people are naturally darker-skinned, or overexposure to the sun in childhood has resulted in their skin not returning to its lighter tone. Treatment solutions can include the introduction of Vitamin C, oral or topical whitening products, usually showing whitening effects in about a month.
Some beauty centers offer intravenous injections of whitening agents, which we do not recommend, as they can pose considerable risks to the body. For more information, you can check out what the U.S. FDA has to say on their website:https://www.fda.gov/ForConsumers/ConsumerUpdates/ucm462212.htm
Vitamin C introduction whitening case (Online data); 維他命C導入美白案例 (網上資料)