Grape Seed in Formulations

"Grapeseed" can refer to two main ingredients used in cosmetics: Grape Seed Oil and Grape Seed Extract.

• Grape Seed Oil (Cold-Pressed): This is an oil commonly used for moisturizing and antioxidant benefits. The recommended usage rate is 1-100% in the oil phase of a formulation. Using it at 5% is well within the recommended range and is generally considered safe for long-term use, providing moisturizing and antioxidant properties without known negative long-term effects at this concentration.

• Grape Seed Extract (Proanthocyanidins): This is a water-soluble extract primarily used for its high antioxidant properties. The recommended usage rate is 0.5-5%. However, the product description notes that using it above 2% can significantly darken the color of the cosmetic product. While 5% is the maximum suggested rate, it's often recommended to use between 0.5-2% to avoid color issues. There are no stated negative long-term effects on the skin from using the extract at 5%, but the color change is a practical consideration for the formulation itself.

In summary, using Grape Seed Oil at 5% is a standard concentration with no indicated long-term negative effects. Using Grape Seed Extract at 5% is the maximum suggested rate, primarily limited by its potential to darken the product color rather than negative skin effects.