•	Cultivation of human skin replacement products for in-vitro testing using cell biology and tissue engineering principles and methods. 
•	LOGAN BIO’s novel approach based upon the co-culture of multiple human primary skin cells in three-dimensional (3D) systems, mimicking physiologically relevant conditions where the skin’s essential biology can be reconstituted and analyzed. 
•	We establish an air-liquid interface in 3D models to generate stratification and differentiation of skin cells. The epidermal skin equivalent can apply to skin irritation tests, skin permeation tests, phototoxicity, skin hydration, anti-aging, skin lightening, pigmentation studies, drug delivery tests, etc.