The Antiperspirant Efficacy – Tewameter test is an instrumental evaluation designed to measure sweat reduction by assessing transepidermal water loss (TEWL).

This test provides objective, quantitative evidence for claims such as “reduces perspiration”, “long-lasting dryness,” and “antiperspirant efficacy.”

Purpose of the Test

The goal of this test is to determine whether a product effectively reduces sweat production over time by measuring changes in water loss from the skin surface.

It is particularly relevant for antiperspirant products and formulations designed to control perspiration and improve skin comfort.

Methodology

The study is performed as an instrumental test using a Tewameter, which measures transepidermal water loss (TEWL) as an indicator of sweat output.

• Number of volunteers: 5 or 10
• Measurement points: Baseline (T0) and post-application time points (e.g., 12h, 24h, 48h)
• Environmental conditions: Controlled temperature and humidity
• Number of samples required: 11 finished product samples

Test Procedure

1. Volunteer selection:
   Ten participants representative of the target population are selected.
2. Baseline measurement (T0):
   TEWL is measured prior to product application using the Tewameter.
3. Product application:
   The test product is applied according to its intended use.
4. Post-application measurements:
   TEWL is measured at selected time points (12h, 24h, 48h) to assess changes over time.
5. Data comparison:
   Results are compared to baseline to determine the level of sweat reduction.

Parameters Evaluated

• Transepidermal water loss (TEWL) — quantitative measurement
• Sweat reduction over time
• Percentage reduction compared to baseline
• Duration of product efficacy
• Confirmation of antiperspirant performance

Sample Requirements

• Quantity: 11 finished product samples
• Condition: Unopened, stable, and ready-to-use
• Product types: Antiperspirant formulations and sweat-control products

Results & Reporting

The laboratory report includes:

• Calculation of percentage reduction versus baseline
• Comparative analysis over time
• Interpretation confirming product efficacy

Why This Test Matters

The Antiperspirant Efficacy – Tewameter test provides reliable, quantitative data demonstrating a product’s ability to reduce perspiration over time.

It supports claims such as:

• “Reduces perspiration”
• “Long-lasting dryness”
• “Effective sweat control up to X hours”

This test is essential for product substantiation, performance validation, and consumer confidence, ensuring that formulations deliver measurable and lasting antiperspirant effects.

How the Process Works

1. Order your lab test
Select the appropriate package and complete your purchase on our website.

2. Receive secure access
After purchase, you’ll receive login details to our secure portal.

3. Complete the intake form
Provide your product details and upload available documentation.

4. Send us your samples
We’ll guide you on exactly what to send to our lab. The sample amount and number depends on several factors. The exact number of samples will be communicated via the portal.

5. Lab testing
We start the lab test.

6. Receive your results
Our safety assessor prepares the lab test results and provides them via the portal.