The hydrating effect of a topical product may be evaluated over short or long term. The Corneometer® measures the hydration on the superficial layers of the skin.
The MoistureMeterD® allows the measurement of hydration up to 8 mm skin deep.
Skin protective barrier function via Tewameter® is another option.
Sensory attributes and perceived performance may be also evaluated through a self-evaluation questionnaire.
Claims
“Instant hydrating effect”, “Long-term hydration”, “Hydrates the skin up to 24h”, “Deep hydration”