Ingredient review

Alaninamido Ornithine

INCI: Alaninamido Ornithine

A gentle amino acid derivative that may help improve skin hydration and barrier resilience, though research is still emerging.

beautyskincarehumectant

In plain English

Alaninamido Ornithine is a lab-made ingredient that combines two amino acids (the building blocks of proteins) to create a small peptide. In skincare, it helps attract and hold moisture in the outer layer of skin, similar to how natural moisturizing factors work. It also supports the skin's barrier, which is the protective shield that keeps irritants out and hydration in. Because it's a gentle, water-soluble ingredient, it's often used in hydrating serums and creams for sensitive or dry skin.

Quick decision guide

Useful, but context matters

Alaninamido Ornithine 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Alaninamido Ornithine.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

emerging

The ingredient may be promising, but claims should be treated more cautiously.

What it is

A semi-synthetic dipeptide derivative made from alanine and ornithine, two amino acids naturally found in the body. It is designed to mimic the skin's own moisturizing components.

How it works

It functions primarily as a humectant, drawing water into the stratum corneum (the outermost skin layer). Additionally, it may help strengthen the skin barrier by supporting the production of natural moisturizing factors and reducing water loss.

Pros

Gentle hydration

Attracts moisture to the skin without irritation, making it suitable for sensitive or reactive skin types.

Barrier support

May help strengthen the skin's natural barrier, reducing moisture loss and improving overall skin resilience.

Cons and cautions

Limited research

Most evidence comes from lab studies or small trials; large-scale human studies are still needed to confirm long-term benefits.

Lower potency

Compared to more established humectants like glycerin or hyaluronic acid, its hydrating effect may be less dramatic on its own.

Best for

  • People with dry or dehydrated skin
  • Those with sensitive skin looking for a gentle hydrator

Use caution if

  • Individuals allergic to any component of the ingredient (rare)

Usage tips

Apply after cleansing on damp skin to maximize hydration.
Layer with a moisturizer containing occlusives to lock in the humectant effect.
Use consistently for at least 4 weeks to see potential barrier improvements.

Safety summary

Alaninamido Ornithine is considered safe for topical use in cosmetics. It has a low irritation and comedogenic risk, and no significant safety concerns have been reported in available literature.

Research notes

Evidence is primarily from in vitro and small clinical studies suggesting humectant and barrier-supporting properties. More robust human trials are needed to confirm efficacy and compare with standard humectants.

Common label clues

Typical concentration
0.1% to 2%
Regulatory status
Generally recognized as safe for cosmetic use in the EU and US at typical concentrations. Not a drug ingredient.
Common uses
Serums, Moisturizers, Eye creams
Environmental note
Semi-synthetic production typically has a lower environmental footprint than fully synthetic alternatives, but specific sourcing data is not publicly available.

Good to know

  • Often found in products marketed for barrier repair or sensitive skin.
  • Can be combined with other humectants like glycerin for enhanced hydration.

Common questions

What is Alaninamido Ornithine in beauty products?

Alaninamido Ornithine is a lab-made ingredient that combines two amino acids (the building blocks of proteins) to create a small peptide. In skincare, it helps attract and hold moisture in the outer layer of skin, similar to how natural moisturizing factors work. It also supports the skin's barrier, which is the protective shield that keeps irritants out and hydration in. Because it's a gentle, water-soluble ingredient, it's often used in hydrating serums and creams for sensitive or dry skin.

What does Alaninamido Ornithine do in a beauty product?

It functions primarily as a humectant, drawing water into the stratum corneum (the outermost skin layer). Additionally, it may help strengthen the skin barrier by supporting the production of natural moisturizing factors and reducing water loss.

Is Alaninamido Ornithine safe for most people?

Alaninamido Ornithine is considered safe for topical use in cosmetics. It has a low irritation and comedogenic risk, and no significant safety concerns have been reported in available literature.

Who should be careful with Alaninamido Ornithine?

Individuals allergic to any component of the ingredient (rare)

Research sources

CosIng Database - Alaninamido OrnithineOpenPubMed - Amino acids in skin barrier functionOpenINCI Decoder - Alaninamido OrnithineOpen

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.