Best For Skin Types
All, Dry, Combination, Mature
Addresses
Usage Frequency
Daily
What Is Borage Seed Oil PEG-7 Dimethicone Esters?
Borage seed oil PEG-7 dimethicone esters is a hybrid ingredient created by chemically bonding borage seed oil with a silicone polymer (dimethicone) and a humectant (PEG-7). Borage seed oil is rich in omega-6 fatty acids, particularly gamma-linolenic acid (GLA), which has been studied for its potential anti-inflammatory properties. The dimethicone component adds slip and a smooth texture, whilst the PEG-7 helps the mixture blend smoothly into formulations.
In skincare, this ingredient functions as an emollient and conditioning agent. It aims to soften and smooth the skin whilst imparting a silky feel that is typically lighter than traditional oils alone.
How It Works
The borage seed oil component acts as an occlusive emollient, forming a protective layer that helps reduce transepidermal water loss. The dimethicone silicone improves spreadability and creates a smooth, non-tacky finish on the skin surface, while the PEG-7 helps the blend remain stable within the formulation.
This combination allows the conditioning benefits of plant oils to be delivered in a formula with a more refined texture than borage oil alone, making it suitable for a broader range of skin types and product types, including lighter moisturisers and serums.
Clinical Evidence & References
Borage seed oil itself has been studied for potential skin-conditioning and anti-inflammatory effects, particularly due to its GLA content. However, research specifically on this modified form (bonded with PEG-7 dimethicone esters) is limited, and most evidence relates to borage oil used in isolation.
The ingredient is widely used in cosmetic formulations and is generally considered safe, but robust clinical data comparing this specific derivative to other conditioners in skincare is sparse. Any anti-inflammatory benefit would likely depend on concentration and formulation stability.
How to Use
This ingredient is typically incorporated into products by manufacturers rather than used as a standalone treatment. If using a product containing borage seed oil PEG-7 dimethicone esters, apply according to the product instructions. It works well alongside hydrating and barrier-supporting ingredients, and is suitable for both AM and PM routines.
Safety & Precautions
Frequently Asked Questions
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