It contains 50 to over 150 natural active molecules, each with specific biological properties: antioxidant, soothing, purifying, regenerating, or stimulating microcirculation. In cosmetics, this molecular richness allows for a comprehensive action, both on the skin and on the biological mechanisms that regulate its balance.

It is this natural complexity that distinguishes an essential oil from an isolated active ingredient, which is generally limited to a single targeted function.

They are at the heart of our formulas because they offer:

• Visible effectiveness, thanks to their natural affinity with the skin,
• Targeted action, adapted to each skin imbalance,
• An active sensory dimension, through olfaction, which positively influences emotional state.

At Decléor, essential oils are never an afterthought.

They are the driving force behind the overall effectiveness of the treatments.

Essential oils are powerful natural concentrates. Their safety relies on three inseparable pillars:

• botanical selection,
• precise dosage,
• their integration into a tested cosmetic formula.

At Decléor:

• essential oils are never applied pure,
• concentrations are strictly controlled,
• each treatment is dermatologically tested, including on sensitive skin.

This approach combines performance and high skin tolerance.

Two plants of the same species can produce very different essential oils depending on:

• the climate,
• the soil,
• the altitude,
• the harvest period.

The chemotype corresponds to the biochemical identity card of an essential oil.

At Decléor:

• each oil is chemically analyzed,
• its chemotype is identified and controlled,
• its composition is reproducible from one batch to another.

The chemotype is an essential condition for safety, effectiveness, and consistency of results.

We select plants grown in their original terroir, where their biochemical profile is optimal.

The harvest is carried out at the exact moment when the concentration of active molecules is at its peak, according to:

• the season,
• the flowering cycle,
• and sometimes even the time of day.

An essential oil is a fragile molecular concentrate. Its quality directly depends on its extraction method.

Steam distillation

• gentle method,
• respects heat-sensitive molecules,
• allows obtaining a complete active spectrum.

Cold pressing (citrus)

• preserves the most delicate aromatic fractions,
• retains soothing and energizing properties.

Each batch is tested by gas chromatography coupled with mass spectrometry (GC-MS), ensuring:

• the identity of the oil,
• its purity,
• the absence of contaminants (pesticides, heavy metals, uncontrolled allergens).

Essential oils are natural substances sensitive to air, light, and heat.

Poor storage can lead to progressive oxidation, which may alter their properties.

At Decléor, the stability of essential oils is ensured by:

• protective packaging that limits exposure to air and light,
• appropriate closure systems,
• stability tests on the finished formulas.

Decléor products are designed to preserve the quality, safety, and effectiveness of essential oils throughout their use.

The use of essential oils in cosmetics is strictly regulated by European legislation, notably Regulation (EC) No 1223/2009 on cosmetic products.

At Decléor, each formula is developed in compliance with this demanding regulatory framework, which requires:

• adherence to the maximum authorized concentrations for each essential oil and each molecule,
• consideration of specific restrictions related to certain components naturally present in essential oils,
• a comprehensive safety assessment of the finished product before it is placed on the market,
• strict obligations of information and transparency for the consumer.

The essential oils used in Decléor treatments thus meet high cosmetic, dermatological, and regulatory standards, ensuring safe and controlled daily use.

The issue of endocrine disruptors is currently the subject of many questions in cosmetics.

To date, essential oils are not classified as endocrine disruptors under European regulations. As with any cosmetic ingredient, risk assessment is based on several criteria: the nature of the molecules, their concentration, the route of exposure, and the frequency of use.

At Decléor:

• essential oils are carefully selected,
• their dosage is strictly controlled,
• each formula undergoes a comprehensive safety evaluation before being marketed, in accordance with European cosmetic regulations.

This approach ensures safe and controlled use, without exposure to a proven endocrine risk under normal cosmetic use conditions.

Thanks to their fine and lipophilic molecular structure, essential oils have excellent skin affinity.

They work deeply and simultaneously target several biological mechanisms, which explains their overall effectiveness.

This powerful action requires absolute mastery of dosage, at the heart of Decléor's expertise.

Decléor treatments contain no synthetic fragrance.

Their signature scent comes exclusively from essential oils.

Each fragrance is designed to:

• soothe,
• stimulate,
• refocus.

This is the principle of aromachology, which affects both emotional state and skin quality.

The use of essential oils in cosmetics is strictly regulated by European legislation, notably Regulation (EC) No 1223/2009 on cosmetic products.

At Decléor, each formula is developed in compliance with this demanding regulatory framework, which requires:

• adherence to the maximum authorized concentrations for each essential oil and each molecule,
• consideration of specific restrictions related to certain components naturally present in essential oils,
• a comprehensive safety assessment of the finished product before it is placed on the market,
• strict obligations of information and transparency for the consumer.

The essential oils used in Decléor treatments thus meet high cosmetic, dermatological, and regulatory standards, ensuring safe and controlled daily use.