Efficacy testing: redness reduction


Redness in the skin, also known as erythema, is a common skin reaction that occurs due to the dilatation of blood vessels near skin's surface. There are various factors, including environmental factors, allergic reactions, skin conditions (rosacea, eczema, psoriasis), skin sensitivity, irritants (harsh chemicals, abrasive skincare products), infections, inflammation disorders (lupus), sunburn.

The process of redness in the skin involves blood vessel dilatation, inflammation, vasodilation, and nerve activation. The duration and intensity of redness can vary, it can be mild and temporary (exercise, temperature) or prolonged and severe (rosacea, sunburn).

Sings of redness

Redness can manifest in various ways. Some common signs are visible red hue, blushed appearance, warmth, itching, burning sensation, swelling, stinging…

Addressing redness involves identifying and addressing the cause. We recommend avoiding triggers, using gentle skincare products, protecting skin…

Claims related to skin redness

Redness reduction

Cosmetics testing
Cosmetics testingCosmetics testing

Measurement principles and instruments

To prove redness reduction claims we measure the following parameters using the following instruments:

Skin colour evaluation

  • Mexameter® MX 18 probe (CK Electronics)

  • Dermalab (Cortex Technologies)

  • Callegari SoftPlus (Callegari)

Skin temperature

See our results

Microcamera SoftPlus - Callegari

Cosmetics testing

Example of skin redness

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.

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