Clinical and Laboratory Tests

Our products care


THOYA Laboratoire strives to develop high-quality, plant-based, and hypoallergenic formulations that protect, nourish, and hydrate the skin (from the most sensitive to all skin types) exposed to harmful environmental factors. All our product are designed with effective and non-toxic natural-origin ingredients.


Elizabeth Hartinger, Ph.D., M.A.Sc., B.Eng.

Founder & President

Elizabeth is committed to cutting-edge skin research and has acquired over the years extensive experience in dermatological technologies. Her postdoctoral studies were conducted at Harvard University and Massachusetts General Hospital in Boston, USA, where she worked on a novel laser technology in the field of dermatology. Elizabeth completed a doctoral and a master degree in biomedical engineering at Montreal University/Ecole Polytechnique in Montreal, Canada. While pursuing graduate studies, she developed an innovative technology for skin cancer detection and acquired comprehensive knowledge of the skin and cutaneous pathologies.

Preoccupied by both the harmful environmental factors and the large amount of chemicals in everyday skincare, Elizabeth founded THOYA Laboratoire as a commitment to develop a new generation of hypoallergenic professional  skin care  with highly effective, carefully selected, safe, all natural origin, and organic ingredients.


THOYA researchers at Sciencederm are committed to work on next-generation products designed to protect, maintain and optimize the health of the skin. Sciencederm has established collaborations with renowned institutions, companies, and universities and pursues continuous research and development in the field of technologies in dermatology.

Hypoallergenic, Not Irritant,

Dermatologist Tested

All THOYA products are clinically tested hypoallergenic and non irritant under dermatological control by an independent laboratory. THOYA products are formulated without fragrances, chemical UV filters, essential oils, citrus extracts, phenoxyethanol, EDTA, and other potentially irritating ingredients. Learn more


Products are tested on a panel of at least 50 adult volunteers using the Human Repeat Insult Patch Test (HRIPT) protocol during a period of 6 weeks.


This test consists in repeated application of patches containing the product sample on the skin of volunteers to assess the potential of the product to induce irritation/sensitization. This skin test is performed under dermatological control.


Every THOYA product undergoes the HRIPT testing process to confirm its safety and can be qualified as hypoallergenic and not irritant. 


Sunscreen Tests


THOYA sunscreens are rigorously tested by independent laboratories according to strict regulatory standards and are all approved by Health Canada.

Sun Protection Factor (SPF)


SPF testing is performed according to strick FDA standard rules and is performed by an independent laboratory on a panel of at least 10 adult volunteers of different skin prototypes. The SPF ratio is computed from the energies that produce the first perceptible erythema (burning) with defined edges for sunscreen protected skin and unprotected skin of the same volunteer. The SPF of a sunscreen is obtained by computing the arithmetic mean value of all valid SPF numbers obtained from all volunteers in the trial. Learn more about SPF


Broad Spectrum


All THOYA sunscreens are also tested according to the FDA standard test for broad-spectrum (UVA + UVB) protection. This test consists in an in vitro (laboratory) analysis that measures the absorbance spectrum of the tested sunscreen product from 290 nm to 400 nm.  The critical wavelength value of the product is then computed from the absorbance spectrum curve and must be equal or higher than 370 nm for a sunscreen to be labelled broad spectrum. All THOYA sunscreens offer broad-spectrum (UVA + UVB) protection.



Laboratory Analyses

Products developed by THOYA are designed to comply with the highest standards in dermocosmetics. Each formula undergoes a series of rigorous laboratory tests and microbiological analysis to assess its stability, safety, and quality.




*THOYA products are not tested on animals.

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