Disodium Succinoyl Farnesylcysteine
INCI: DISODIUM SUCCINOYL FARNESYLCYSTEINE
Reviewed by Emma · Last updated 14 Aug 2026
A farnesylated amino acid derivative designed to reinforce skin's protective barrier
Best For Skin Types
All, Sensitive, Dry
Addresses
Usage Frequency
Daily
What Is Disodium Succinoyl Farnesylcysteine?
Disodium succinoyl farnesylcysteine is a synthetic ingredient derived from cysteine, an amino acid, with a farnesyl group attached. The farnesyl moiety is a lipid-like compound found naturally in cells and known for its role in cellular signalling and membrane integrity. This particular combination creates a molecule designed to interact with and support the skin's outer layers.
In formulations, this ingredient functions as a skin protectant, with the aim of strengthening the skin barrier and reducing transepidermal water loss (TEWL). Its lipophilic (fat-loving) properties allow it to integrate into the skin's lipid matrix, potentially enhancing barrier function.
How It Works
The ingredient works by mimicking and supplementing the natural lipids present in the stratum corneum—the skin's outermost layer. The farnesyl component is lipophilic and can integrate into the intercellular lipid matrix, whilst the amino acid backbone provides structural compatibility with skin proteins and ceramides.
By occupying space within this lipid network, it theoretically reduces gaps and cracks that allow water to escape, thereby strengthening barrier integrity. This mechanism is consistent with how other lipid-like molecules function in barrier repair formulations, though the specific efficacy of this particular ingredient remains understudied in published literature.
Clinical Evidence & References
Published clinical evidence specific to disodium succinoyl farnesylcysteine is limited. Most claims rest on in vitro studies and theoretical mechanisms based on its chemical structure and how similar farnesylated compounds behave in cellular models.
The farnesyl scaffold has a known history in skincare as a delivery system and membrane-enhancing agent, which provides some confidence in its protective function. However, human efficacy studies comparing this ingredient to established barrier-repair actives (such as ceramides or niacinamide) are not readily available, so benefit claims should be considered provisional.
How to Use
This ingredient is typically incorporated into moisturisers, serums, or barrier-repair products at very low concentrations. Apply to clean skin, either alone or layered with other hydrating or active ingredients. Since it functions as a supportive barrier agent rather than an active treatment, consistent use over several weeks is more likely to demonstrate benefit than sporadic application. It works well in combination with other barrier-supporting ingredients such as ceramides, peptides, or hyaluronic acid.
Safety & Precautions
Frequently Asked Questions
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