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Wearable devices measure skin hydration and oil levels using electromagnetic sensors and biological signal analysis. Here’s how these technologies work:
1. Measuring Skin Hydration
To assess skin hydration, wearable devices often use Bioelectrical Impedance Analysis (BIA):
- How it works:
- A small electrical current is passed through the skin, and the device measures the resistance (impedance) to the current.
- Well-hydrated skin conducts electricity better, while dry skin offers more resistance.
- The hydration level is calculated based on these readings.
- Examples of use:
- Smartwatches or patch-based wearables that make direct contact with the skin can continuously collect hydration data.
2. Measuring Skin Oil Levels
Oil level measurement relies on optical sensors or spectroscopy technology:
- How it works:
- Specific wavelengths of light (e.g., infrared or visible light) are projected onto the skin.
- Skin oil absorbs or reflects light in characteristic ways, enabling the device to quantify oil levels.
- Examples of use:
- High-end skincare wearables use this technology to analyze skin oil levels and provide personalized skincare recommendations.
3. Compensation for Environmental Factors
These measurements can be influenced by external factors like temperature and humidity. To address this:
- Wearables often include additional sensors to measure environmental conditions.
- The collected environmental data is used to adjust hydration and oil level readings for greater accuracy.
4. Notable Wearable Devices
- L’Oréal’s My Skin Track UV: Tracks skin hydration, UV exposure, and environmental factors.
- Way by ModiFace: A patch-like wearable that measures skin hydration and offers personalized skincare advice.
- Philips SkinAnalyser: Analyzes skin oil and hydration levels to provide real-time skincare insights.
5. Future Potential
Wearable devices for skin monitoring are increasingly integrating AI to offer more precise analysis and predictions. For example, devices may soon:
- Recommend personalized skincare products based on hydration and oil data.
- Predict changes in skin conditions.
- Provide early warnings for skin-related health concerns, such as dehydration or certain dermatological issues.
This combination of cutting-edge technology and real-time monitoring is paving the way for more advanced and personalized skincare solutions.
Author, I have a question after reading your post. You said you could measure skin moisture with a wearable, right? But you said it passes an electric current. Doesn’t that cause a tingling sensation or discomfort on the skin?
Oh, no need to worry. The current is so tiny that you can barely feel it. It’s only measuring skin resistance, so it’s safe, and there’s almost no discomfort even if you wear it continuously.
Oh, then how do you measure sebum (oil)? Is it similar to the principle of electric current?
No, sebum is measured using light. When you shine light of a specific wavelength onto the skin, the oil absorbs or reflects different amounts, and the sensor reads that and calculates the amount of oil.
Wow… So the measurements could be affected by environmental temperature or humidity?
Yes. That’s why wearables these days come with ambient temperature and humidity sensors. They compensate for any distortion in the values, so you can get fairly accurate data in real time.
