The Transonychial Water Loss (TOWL) is widely used in the Allergisa’s labs to quantify the water content of nails, using the Tewameter® Nano. The structure of the nail plate also limits the passage of water and it is expected that a damaged nail will be more permeable to water. With this technique man can study the occlusive power, the barrier function with the integrity of the keratin and also the major recovery of cracks and flaking. Allergisa’s team also evaluates the biomechanical properties using the Instron machine to measure the strain stress, the strength and the elasticity of nails. As many claims, associating different parameters study and the consumers’ perception is the best solution.

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