Efficacy testing: redness reduction
General skin testing protocol
Number of subjects
20 (determined by client)
Place of application
Face / Arm / Thigh (determined by client)
Testing time
4 weeks (determined by client)
Sample requirement
Equal to the number of subjects
Measurement points
- T0 – before application (cleaned skin surface, adaptation time 20 min)
- Tx – after x weeks (determined by client)
Procedure
- Washout phase at least 2 h before the measurement
- 3–5 measurements on the testing site (“BEFORE testing”)
- Product used by participants at home during the testing period
- 3–5 measurements on the testing site (“AFTER testing”)
Equipment
- Demaflex / Dermalab (Cortex Technologies)
- Soft FX (Callegari, 1930)
- EVE M Panoramic AI skin analyzer
Signs of redness
Signs 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
Measurement principles and instruments.
Measurement principles and instruments.
To prove redness reduction claims we measure the following parameters using the following instruments:
- Skin colour evaluation
- Dermalab (Cortex Technologies)
See our results.
Redness
Redness
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).
A protocol built for your claims.
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.
Ready to substantiate your redness reduction claims?
Speak with our experts about an efficacy testing protocol tailored to your cosmetic product.
