Can taking oral niacinamide really whiten the skin?

Generally, taking niacinamide orally may lead to skin whitening. However, since everyone's skin condition and metabolic capacity differ, individual responses to niacinamide can vary significantly. Therefore, it is advisable to consult a healthcare professional before attempting oral niacinamide for skin lightening.

Niacinamide, also known as vitamin B3, is a multifunctional skincare ingredient that offers antioxidant and anti-inflammatory benefits, helps repair the skin barrier, and regulates sebum production. It achieves skin-lightening effects by reducing melanosome transfer from melanocytes to keratinocytes, thereby inhibiting melanin production. Additionally, niacinamide improves skin texture, accelerates the shedding of pigmented cells, regulates lipid metabolism, and provides antioxidant protection—all contributing to enhanced overall skin brightness and whitening. However, not everyone will experience visible whitening effects from oral niacinamide, primarily due to individual differences such as genetics, hormonal levels, lifestyle, and dietary habits.

Skin lightening is a comprehensive process. Besides taking niacinamide orally, it's important to pay attention to daily skincare routines, sun protection, and dietary adjustments. Only through a combination of these measures can optimal whitening results be achieved.