Ingredient review
Bis-Hexyldioxodecyl Methyl Lysinate
INCI: BIS-HEXYLDIOXODECYL METHYL LYSINATE
A mild, amino-acid-based surfactant that cleanses without stripping the skin barrier — a good choice for sensitive or dry skin.
In plain English
This ingredient is a gentle cleanser made from lysine (an amino acid) and fatty acids. It helps remove dirt, oil, and makeup without leaving your skin feeling tight or dry. Think of it as a kinder alternative to traditional harsh soaps.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Bis-Hexyldioxodecyl Methyl Lysinate is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Bis-Hexyldioxodecyl Methyl Lysinate.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
Bis-Hexyldioxodecyl Methyl Lysinate is a synthetic surfactant derived from the amino acid lysine. It belongs to the family of acyl amino acid surfactants, which are known for being mild on skin and having good foaming properties.
How it works
In a cosmetic product, this molecule has a water-loving head (the lysine part) and an oil-loving tail (the fatty chain). When you rinse with water, it surrounds and lifts away dirt and oil from your skin, allowing them to be washed off. Its mildness comes from a pH close to skin's natural level and a large molecular structure that doesn't penetrate deeply.
Pros
Very mild on skin
Its large molecular structure and near-neutral pH mean it cleanses without disrupting the skin's moisture barrier, reducing the risk of irritation or tightness.
Good for daily use
Because it's so gentle, you can use it morning and night without worrying about over-cleansing or drying out your skin.
Cons and cautions
Less effective on heavy makeup
If you wear long-wear or waterproof makeup, you may need a double-cleanse routine (oil cleanser first) since this surfactant alone may not dissolve stubborn products.
Higher cost
Amino-acid surfactants are more expensive to produce than traditional sulfates, so products containing them often come with a higher price tag.
Best for
- People with dry or sensitive skin looking for a non-stripping cleanser
- Anyone wanting to avoid harsh sulfates in their daily face wash
Use caution if
- Those who prefer a high-foam, squeaky-clean feel may find this too gentle
Usage tips
Safety summary
Bis-Hexyldioxodecyl Methyl Lysinate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for sensitive skin. No significant safety concerns have been reported in regulatory reviews.
Research notes
Amino-acid-based surfactants like this one have been studied for their mildness and skin compatibility. Research indicates they cause less protein denaturation and barrier disruption compared to traditional anionic surfactants. However, specific long-term studies on this exact compound are limited.
Common label clues
- Typical concentration
- 0.5% to 5% in rinse-off products; lower in leave-on formulas
- Regulatory status
- Approved for use in cosmetics globally; no known restrictions in the EU, US, or Asia.
- Common uses
- Facial cleansers, Body washes, Micellar waters, Shampoos
- Environmental note
- As a synthetic amino-acid surfactant, it is generally biodegradable, but always check the full formulation for overall eco-impact.
Good to know
- This ingredient is often found in 'sulfate-free' cleansers marketed for sensitive skin.
- It is biodegradable and considered more environmentally friendly than some traditional surfactants.
Common questions
What is Bis-Hexyldioxodecyl Methyl Lysinate in beauty products?
This ingredient is a gentle cleanser made from lysine (an amino acid) and fatty acids. It helps remove dirt, oil, and makeup without leaving your skin feeling tight or dry. Think of it as a kinder alternative to traditional harsh soaps.
What does Bis-Hexyldioxodecyl Methyl Lysinate do in a beauty product?
In a cosmetic product, this molecule has a water-loving head (the lysine part) and an oil-loving tail (the fatty chain). When you rinse with water, it surrounds and lifts away dirt and oil from your skin, allowing them to be washed off. Its mildness comes from a pH close to skin's natural level and a large molecular structure that doesn't penetrate deeply.
Is Bis-Hexyldioxodecyl Methyl Lysinate safe for most people?
Bis-Hexyldioxodecyl Methyl Lysinate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for sensitive skin. No significant safety concerns have been reported in regulatory reviews.
Who should be careful with Bis-Hexyldioxodecyl Methyl Lysinate?
Those who prefer a high-foam, squeaky-clean feel may find this too gentle
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.