Efficacy testing: pore size reduction

Sebum production

Sebum is produced by sebaceous glands, which are distributed all over the skin except on the palms and soles of the feet. Sebum is secreted onto the skin and hair surface, where it functions as a protectant by creating a thin film on the surface of stratum corneum. Sebum is a complex mix of lipids and consists of triglycerides, wax esters, cholesterol esters, squalene as well as free cholesterol and fatty acids.

The overproduction of serum is usually associated with oily skin type. This condition is called seborrhea and it is usually linked to genetic factors but may also happen in subjects with non-greasy skin in specific stages of life such as adolescents, post-menopausal (due to hormonal changes), or it can also be triggered by stress or medication.

Sings of increased sebum production

Oily skin is characterized by the accumulation of sebum on the skin surface, which causes dilation of pores and acne. The cell turnover slows, and the skin often appears denser and uneven, it turns a yellowish colour and tends to develop blackheads and pimples.

Claims related to sebum production

Pore minimising

Sebum regulating

Mattifying effect

Cosmetics testing

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Cosmetics testing
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Before product application

Cosmetics testing

After 6 week treatment

Cosmetics testing

Skin pores 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 sebum

Evaluation of pore (size)

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

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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