Ingredient review
Lysine Glutamate
INCI: Lysine Glutamate
A mild, amino-acid-based pH adjuster that helps keep cleansers and toners gentle while supporting skin’s natural barrier.
In plain English
Lysine Glutamate is a salt made from two amino acids (lysine and glutamic acid). In skincare, it’s used to fine-tune the acidity of a product without harsh chemicals. It also helps the skin feel soft and smooth, and because it’s derived from natural building blocks of protein, it’s considered very gentle—even for sensitive skin.
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
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Lysine Glutamate 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 Lysine Glutamate.
- 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
Lysine Glutamate is the salt formed by combining the amino acids L-lysine and L-glutamic acid. It appears as a white powder and is used primarily as a buffering agent to maintain a product’s pH in a skin-friendly range (typically 5.0–6.0).
How it works
When added to a formula, Lysine Glutamate releases small amounts of lysine and glutamate ions that help stabilize the pH. This prevents the product from becoming too acidic or too alkaline, which can irritate skin. Additionally, the amino acids can lightly condition the skin, leaving it feeling smoother after rinsing.
Pros
Extremely gentle pH adjuster
Unlike citric acid or sodium hydroxide, Lysine Glutamate is derived from amino acids and has a very low irritation profile, making it ideal for sensitive-skin formulas.
Supports skin barrier comfort
By keeping the product’s pH close to skin’s natural level (around 5.5), it helps maintain the acid mantle and reduces the risk of dryness or stinging.
Cons and cautions
Not a standalone active
Lysine Glutamate does not provide exfoliation, hydration, or anti-aging benefits on its own—it’s a helper ingredient that works behind the scenes.
Limited research on long-term effects
While generally recognized as safe, there are fewer studies on Lysine Glutamate compared to more common pH adjusters like citric acid.
Best for
- Anyone with sensitive or reactive skin looking for gentle cleansers
- People who prefer amino-acid-based, mild skincare formulations
Use caution if
- Those seeking a strong exfoliating or active treatment ingredient
Usage tips
Safety summary
Lysine Glutamate is considered safe for topical use. It is non-irritating and non-sensitizing at typical cosmetic concentrations. No significant safety concerns have been reported in regulatory reviews.
Research notes
Research on Lysine Glutamate specifically is limited, but the safety of amino acids and their salts in cosmetics is well-established through industry safety assessments and regulatory approvals. Its primary function as a pH buffer is supported by basic chemistry principles.
Common label clues
- Typical concentration
- 0.5–3% in rinse-off products; lower in leave-on formulas
- Regulatory status
- Approved for cosmetic use in the EU, US, and most major markets. The Cosmetic Ingredient Review (CIR) panel has deemed amino acids and their salts safe in leave-on and rinse-off products at typical concentrations.
- Common uses
- Cleansers, Toners, Serums
- Environmental note
- Amino-acid-based ingredients are generally biodegradable and have a lower environmental impact than some synthetic pH adjusters.
Good to know
- Lysine Glutamate is sometimes listed simply as 'Lysine Glutamate' on labels, but it may also appear as part of a blend with other amino acids.
- It is not the same as monosodium glutamate (MSG)—they are different compounds with different uses.
Common questions
What is Lysine Glutamate in beauty products?
Lysine Glutamate is a salt made from two amino acids (lysine and glutamic acid). In skincare, it’s used to fine-tune the acidity of a product without harsh chemicals. It also helps the skin feel soft and smooth, and because it’s derived from natural building blocks of protein, it’s considered very gentle—even for sensitive skin.
What does Lysine Glutamate do in a beauty product?
When added to a formula, Lysine Glutamate releases small amounts of lysine and glutamate ions that help stabilize the pH. This prevents the product from becoming too acidic or too alkaline, which can irritate skin. Additionally, the amino acids can lightly condition the skin, leaving it feeling smoother after rinsing.
Is Lysine Glutamate safe for most people?
Lysine Glutamate is considered safe for topical use. It is non-irritating and non-sensitizing at typical cosmetic concentrations. No significant safety concerns have been reported in regulatory reviews.
Who should be careful with Lysine Glutamate?
Those seeking a strong exfoliating or active treatment ingredient
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.