Yon-Ka | Beauty Products

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About Us


Our research & development lab’s expertise

Driven by pharmaceutical rigour, our team of scientists (doctors, doctors of pharmacy, chemical engineers, biologists, bacteriologists) develops formulas with the best efficacy/safety ratio for optimal safety and visible, long-lasting results without aggression.

All products put on the market are tested for safety and tolerance and evaluated by an independent toxicologist.

What tests do we use to measure the effectiveness of our products?

Product efficacy claims are based on objectification tests carried out by independent laboratories under medical supervision. They involve different methods of objectification depending on the products developed:

  • in vitro tests on cell cultures,
  • ex-vivo tests on skin explants,
  • clinical evaluations (scoring of different parameters and instrumental measurements: wrinkles, radiance, pigmentation spots, comedogenicity, hydration, exfoliating- brightening-firming powers, sun protection index, etc.)
  • self-evaluation tests by a consumer panel

*In accordance with European regulations and our ethics, our products are not tested on animals.

Our Production Unit – Rigour and Safety

Our manufacturing, primary packaging and controls are carried out in accordance with international GMP ISO 22716 standards (Good Manufacturing Practices), in clean rooms, i.e. under filtered air, optimal conditions for maximum bacteriological safety.

All our raw materials are rigorously selected, analysed and controlled by our laboratories to guarantee the purest active ingredients.

The physico-chemical and bacteriological controls of each raw material and of each manufactured and packaged product are all carried out internally.

The traceability of our products is guaranteed right up to the point of distribution.

Our Formulation Charter

Our formulation charter is very strict in order to offer you products that are effective, safe, as natural as possible and respectful of the environment.

  • An average of 92% of ingredients of natural origin in all our formulas: For all its new products, Yon-Ka strives to reach 95% of ingredients of natural origin, or even more.
  • Certified organic ingredients: At the heart of our formulas, we take care to select active ingredients that are preferably organic.
  • Mostly vegan* formulas (nearly 80%)
  • Formulas that respect biodiversity and people: We select sustainable supply chains to limit our impact on the environment.
  • A red list of ingredients banned from our formulas: Parabens, Methylisothiazolinone (MIT), Aluminium salts, Butylhydroxyanisole (BHA), Sodium Lauryl Sulfate (SLS), Phthalates, Triclosan, GMOs, Proven endocrine disruptors**

Ingredients gradually replaced in our old formulas, according to our constraints and possibilities: Acrylates, EDTA, Phenoxyethanol, Silicones, PEG / PPG, synthetic PG…
These ingredients, although internationally authorised and perfectly tolerated, are contested by some. They are sometimes difficult to substitute for questions of bacteriological safety, texture and stability. Yon-Ka is committed to this long process of reformulation for ever greater naturalness and environmental protection.

reformulation for ever greater naturalness and environmental protection.

*No ingredients of animal origin

** According to the WHO definition and with reference to the Echa list (European Chemicals Agency)

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