The Sebum Regulation Test is a laboratory evaluation that measures the level of natural oils (sebum) on the skin surface. It helps determine how effectively a cosmetic product can reduce excess sebum, control shine, or balance skin oil production. This test is essential for products claiming mattifying, oil-control, or sebum-regulating effects.

Purpose of the Test

The purpose of the Sebum Regulation Test is to assess whether a product decreases, maintains, or increases sebum secretion over time. It provides quantitative evidence to support marketing claims for oily or combination skin care products, such as “reduces shine,” “controls oil production,” or “balances skin.”

How the Test Works

The test is conducted using an Apparatus Test, typically with a Sebumeter or similar instrument. The device measures the amount of sebum collected on a special film pressed against the skin surface for a defined period. The amount of oil absorbed by the film is quantified by optical analysis, providing an accurate measure of sebum production.

Applications in Cosmetic Testing

• Evaluation of mattifying creams, gels, and lotions
• Assessment of oil-control skincare formulations
• Validation of sebum-balancing or anti-shine claims
• Testing of products for oily, acne-prone, or combination skin
• Measurement of sebum levels before and after product application

Test Procedure

1. Volunteers are acclimatized in a controlled environment for temperature and humidity.
2. Baseline sebum levels are measured on untreated skin areas using a Sebumeter.
3. The test product is applied according to usage instructions.
4. Subsequent sebum measurements are taken at defined intervals (e.g., 30 minutes, 2 hours, 4 hours, 6 hours).
5. Changes in sebum production are analyzed statistically to determine product efficacy.

Results & Reporting

The final report includes:

• Test protocol and equipment used
• Baseline and post-application sebum levels
• Statistical analysis of sebum reduction or balance
• Interpretation of product performance and efficacy
• Optional graphical representation of results

Why This Test Matters

Sebum plays an essential role in skin protection, but excess oil can cause shine, clogged pores, and breakouts. The Sebum Regulation Test provides objective data showing whether a cosmetic formulation effectively reduces oil production or restores balance. It supports product claims for clear, matte, and balanced skin.

Sample Requirements

• Minimum quantity: 50–100 g or mL of finished product
• Number of samples: 11 finished products
• Product type: creams, gels, serums, lotions, masks, or cleansers
• Storage: room temperature unless otherwise specified

Turnaround Time

Typical turnaround time is 10–15 working days from receipt of samples and protocol confirmation.

Deliverables

• Comprehensive laboratory report in PDF format
• Raw and analyzed data of sebum levels over time
• Summary suitable for regulatory, R&D, and marketing use

Compliance & Standards

The Sebum Regulation Test is conducted following international cosmetic testing standards under controlled laboratory conditions. All procedures comply with Good Laboratory Practice (GLP) and ensure reproducible, scientifically validated results.

Related Tests

• TEWL (Transepidermal Water Loss) Test
• Corneometry (Skin Hydration Measurement)
• Skin pH Measurement
• Shine Reduction Visual Assessment