Polygonum cuspidatum, also known as Japanese knotweed, is a plant native to Asia. The extract obtained from its roots is commonly known as Polygonum cuspidatum extract or more specifically, resveratrol extract. It is a potent antioxidant and has been used for its health benefits for centuries in traditional Chinese medicine.

• Anti-aging: Resveratrol, the primary active ingredient in Polygonum cuspidatum extract, is a potent antioxidant that helps to protect the skin from free radical damage and prevents premature aging. It also stimulates collagen production, which improves skin elasticity and reduces the appearance of fine lines and wrinkles.

• Brightening: Polygonum cuspidatum extract has been shown to inhibit melanin synthesis, making it an effective ingredient for brightening the skin and improving uneven skin tone.

• Anti-inflammatory: Polygonum cuspidatum extract has anti-inflammatory properties that can help to soothe and calm irritated skin. It is especially beneficial for those with sensitive or acne-prone skin.

Overall, Polygonum cuspidatum extract is a versatile ingredient that can benefit the skin in numerous ways. Its anti-aging, brightening, and anti-inflammatory properties make it a popular choice for skincare products, particularly those targeting hyperpigmentation and uneven skin tone.