Answer to Questions about Cosmetic Formulations

Glycols in Formulas with Water-Soluble Actives

Glycols such as Propylene Glycol or Butylene Glycol are often included in cosmetic formulas even if the main active ingredients are water-soluble. This is because they offer several benefits:

• They help improve the texture and spreadability of the product.
• They can enhance the penetration of certain ingredients into the skin (though this also depends on other factors in the formula).
• They act as humectants, helping to retain moisture in the skin.
• Some types are inexpensive, making them popular for use in higher amounts in certain formulas.

Ingredients that Enhance Skin Penetration (Penetration Enhancers)

Several ingredients can help improve the delivery of beneficial substances into the skin. Ethoxydiglycol is one such ingredient with research supporting its effectiveness as a carrier. Other substances include Laurocapram (both water-soluble and oil-soluble types), Phospholipids, 1,2-Hexanediol, and Dimethyl Isosorbide (DMI). However, caution should be exercised when using this group of ingredients, particularly Ethoxydiglycol, which currently has maximum usage rate restrictions in different product types. The latest regulations should be checked before use.

Choosing an Emulsifier for Vitamin C E Ferulic Formula Without Heat

For a Vitamin C E Ferulic formula where heat is to be avoided, other oil-in-water emulsifiers can be used instead of Laureth-23. There are several Cream Makers that work without requiring heat, such as:

• Light Cream Maker™: This is an emulsifier and thickener that works without heat. It can be used over a wide pH range and can emulsify up to 20% oil. It creates a light, easily absorbed, non-sticky cream texture and has some tolerance for electrolytes.
• Easy Cream Maker™: This is also an emulsifier and thickener that works without heat, usable over a wide pH range and emulsifying up to 10% oil. It produces a slightly heavier cream texture than Light Cream Maker™ and does not tolerate electrolytes.

Soft Cream Maker™ is another option that provides a soft texture and beautiful liquid crystal appearance, but it requires heat during mixing.

Ethoxydiglycol Concentration in Vitamin C E Ferulic Formula

According to the Ethoxydiglycol product information, the current maximum usage rate for leave-on products (such as serums or creams) is not more than 2.6%. Therefore, using a high concentration like 20% may not comply with safety regulations and could potentially cause irritation. The sensation of heat on the skin is often associated with certain humectants like Propylene Glycol, Glycerin, or some preservatives. However, using penetration enhancers at high concentrations could also affect skin feel. It is important to adhere to recommended usage rates and the latest regulations.

Safety of Light Cream Maker™ (Sodium Polyacrylate)

The information suggesting that Sodium Polyacrylate is a toxic substance to be avoided is incorrect. Light Cream Maker™, which contains Sodium Polyacrylate, is considered safe for use in cosmetics. Reliable sources, such as the EWG Skin Deep Database, classify Sodium Polyacrylate as having a low hazard.

Shipping Policy and Rice Vitamin

The company's shipping is handled via postal service. Regarding Rice Vitamin (Inositol, Vitamin B8), the staff previously provided an expected date for its restocking.