Ascorbyl stearate

International Numbering System (INS) for Food Additives: 304

Food additives Europe numbers:E305 

Ascorbyl stearate isn't directly a medicinal substance itself. It falls under the category of a fat-soluble derivative of vitamin C [1]. Here's a breakdown of what we know about Ascorbyl stearate:

• Function: Primarily used as an antioxidant in cosmetics and some food products [1, 2]. As an antioxidant, it helps prevent spoilage caused by oxidation.
• Vitamin C source: While derived from vitamin C, the body absorbs Ascorbyl stearate less efficiently compared to other forms of vitamin C like ascorbic acid [1]. This limits its effectiveness as a direct source of vitamin C.
• Safety: Generally considered safe for use in cosmetics [2]. Regulatory bodies like the US Food and Drug Administration (FDA) have approved its use for this purpose.

Limited Medicinal Use:

Ascorbyl stearate's potential medicinal applications are still under exploration. Some studies suggest it might have a role in:

• Skin health: Due to its antioxidant properties, it might offer some benefits for skin health, but more research is needed [1].

In Contrast to Ascorbyl Palmitate:

Ascorbyl stearate is closely related to another vitamin C derivative, Ascorbyl palmitate. Both share similar properties and functions. However, Ascorbyl palmitate might have slightly better bioavailability (absorption by the body) compared to Ascorbyl stearate [3].