• Nature & Science

    The alchemy of well-being


    Yon-Ka’s choice for more than 50 years


    Ever since our creation, our team of scientist have been devoted  to the selection of  innovative natural active ingredients with undisputed efficiency and originating from:

    - either botanicals or marine extracts, such as the essential oils charged with solar energy, anti-oxidant poly-phenols, regenerating peptides, exfoliating and clarifying fruit acids, vitamins, re-mineralizing trace-elements…

    - or from biotechnologies, like our amazing hydration booster, hyaluronic acid for plumping, or wrinkles' worst enemy, our yeast extract, which stimulates the elastin production….

    Our natural plant extracts are carefully selected and scrutinized so that we can guarantee exact percentage of the active molecules in our formulas for a specific and consistent efficiency of our productions.


    Priority is always given to botanical and plant extracts over biotechnology as long as they can meet our expectations and  conform  to our commitment to quality and results and as long as they are available in a safe and consistent manner.

    Each batch of essential oil entering in our production is submitted to testing in order to ensure its perfect condition, its quality and the active concentration of each particle that composes it. It results to the elimination of non-conform or fraudulent batches.

    Such events are rare to us as we have been working for years with the best and most reliable producers. However, if such issues arise, it is most often related to the scarcity and high prices of the essential oils. Only very specific and precise analysis material can detect such frauds, hence the highly advanced controls of our Quality Control Department



    The strict respect of standards and regulations


    Our formulas strictly respect the most demanding international rules and regulations, when it comes to public health. They are registered and validated by official governmental agencies.

    Thouroughness, and quality control management

    Our production process  is:

    - Air filtered and respects the GMP (Good Manufacturing Process of manufacturing) and is ISO 22716,

    - Minimizes multiple handlings and environmental contact to ensure optimum quality to our end users.


    All our products are formulated, manufactured, controlled and distributed by us so we can provide TOTAL TRACEABILITY of each item we produce, from the raw material so far as its final destination to the point of sell. 

    Before reaching the market and the consumers, each Yon-Ka reference is tested for safety as follows:

    - In vitro tolerance tests following current and recognized alternative methods and with no animal testing

    - In vivo tolerance test under the supervision of an investigating doctor.

    The size of the volunteers’ panel, the duration and the type of tests will depend on the formula of the product, its claims and its recommendation for use. – to know more -


    Yon-Ka Quintessence


    An exclusive and treasured formula combining 5 essential oils with extraordinary synergetic properties. Yon-Ka Quintessence is the DNA of our brand:

    • Fine lavender from Haute Provence (lavandula angustifolia) with calming, healing and anti-inflammatory properties ;
    • Geranium  from Egypt (pélargonium graveolens) with anti-inflammatory, analgesic and healing properties,
    • Thyme from Spain (thymus officinalis), excellent stimulant with powerful antiseptic properties,
    • Cypress from Provence (cupressus sempervirens) decongestant and powerful nervous system regulator.

    Used in various concentrations in 70% of our ranges, always pre-measured to ensure absolute safety and optimum results, Quintessence increases the effectiveness of the ingredients it is combined with and provides an olfactory experience that can be relaxing or energizing depending on what is needed.