Hyaluronic Acid

Benefits
RejuvenationAnti AgingMoisturizingSoftening

What is Hyaluronic Acid?

Hyaluronic acid is a glycosaminoglycan, a long-chain polysaccharide composed of repeating disaccharide units of glucuronic acid and N-acetylglucosamine. It occurs naturally in the human body's connective tissues, skin dermis, synovial fluid, and vitreous humor, where it supports structure and lubrication. In cosmetics, it is primarily produced via microbial fermentation using streptococcal bacteria for high purity and to avoid animal sourcing, though extraction from rooster combs was once common. It appears in serums, moisturizers, gels, and eye creams as a key hydrator. Functionally, it acts by attracting and retaining water molecules—up to thousands of times its molecular weight—within the skin's upper layers, promoting hydration without greasiness. It also stabilizes formulations by controlling viscosity, reducing static, and improving product spreadability, making it versatile across leave-on and rinse-off products.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.
Antistatic agent
Reduces static electricity and flyaways by improving surface conductivity, enhancing hair manageability and smoothness in conditioners and styling products.
Humectant
Attracts and holds water in the stratum corneum, boosting hydration and plumpness; commonly used in moisturizers, cleansers, and hair conditioners.
Moisturising
Improves skin hydration and comfort by combining water-binding (humectant) and barrier-supporting (emollient/occlusive) mechanisms to reduce dryness.

Benefits

Delivers deep hydration by drawing moisture into the skin for a plumped appearance.

Supports skin softening and smoothness through water retention and conditioning.

Aids rejuvenation and anti-aging effects via sustained moisture levels.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals with dry or dehydrated skin seeking hydration.
Those with rare allergies to hyaluronic acid or its fermentation sources.
Those concerned with visible aging signs like fine lines from dryness.
Individuals experiencing irritation from high-humectant formulas in low-humidity environments.
People desiring softer, more flexible skin texture.
People with compromised skin barriers where excess moisture draw might occur.

Safety Notes

  • Rated as low hazard by authoritative cosmetic safety assessments.
  • Generally well-tolerated across skin types with minimal reported irritation.

Frequently Asked Questions about Hyaluronic Acid

What makes hyaluronic acid suitable for daily skincare?

Its humectant properties provide ongoing hydration while conditioning skin without heaviness.

Is hyaluronic acid non-comedogenic?

Yes, it has a comedogenic rating of 0, suitable for acne-prone skin.

Can hyaluronic acid benefit all skin types?

It supports hydration for most, though patch testing is advised for sensitivities.