Efficacy testing: skin sensitivity evaluation, soothing, anti-irritating and repairing effect, redness reduction

Skin sensitivity

Sensitive skin is a condition of hyperreactivity to environmental factors or topically applied products. Skin sensitivity is associated with disrupted skin barrier function, which causes increased transepidermal water loss (TEWL) and allows penetration of irritants. Environmental pollutants, exposure to UV light or cosmetic products as well as stress, hormonal changes, cold weather can cause or worsen sensitive skin.

Sensitive skin reacts more easily to cosmetic products. Generally, this abnormal response is produced by substances, which are not commonly considered irritants.

Sensitive skin can be characterized by a spectrum of symptoms and can be divided into 4 subtypes: acne type (prone to acne, blackheads, whiteheads), rosacea type (prone to redness, flushing and hot sensations), stinging type (tendency to burning or stinging sensations) and allergic type (prone to skin flaking, itching and erythema). But they all share one common factor, that is inflammation.

Sings of sensitive skin

People with sensitive skin suffer from itching, burning, stinging, tightening sensations, which may be accompanied by erythema. Based on different subtypes, sensitive skin may also be associated with the onset of acne, redness, flushing sensations and flaking.

Claims related to skin sensitivity

Improving skin barrier




Redness reduction

Cosmetics testing

See our results

Cosmetics testing
Cosmetics testing

Before product application

Cosmetics testing

After 6 week treatment

Cosmetics testing

Skin sensitivity analysis

Measurement principles and instruments

Measurements are performed using Callegari 1930 Company - Soft Plus device, which is an instrument designed to assess a variety of skin parameters.

Measurements include:

Evaluation of skin pH

Evaluation of skin elasticity

Evaluation of skin hydration

The measurement principle combines direct measurements via probes with micro-camera visual assessments.

The measurement of skin surface pH helps us evaluate the state of diseased skin by measuring pH shifts of the skin following external exposures.

Evaluation of stratum corneum hydration is achieved through a scientifically acknowledged capacitive method, which measures the amount of electric current passing through a capacitor.

Efficacy testing protocol is prepared for each product individually with close cooperation with the sponsor. Based on the claims, usage regime and efficacy expectations, we prepare a protocol that is suitable for the type of product and can confirm product efficacy. The studies can be performed over a different time period (from a few days to several weeks or months) depending on the claim and type of measurement.

Cosmetics testingCosmetics testing

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