Why You Must Patch Test

Application of new formulas to the entire face is a common source of avoidable irritation. A patch test is a low-effort exercise in prevention that requires minimal preparation. By isolating a small area of skin, you determine compatibility without risking a widespread reaction.

The process relies on patience and observation. It is not an indicator of efficacy, but rather an indicator of tolerance.

1. Select your site. Choose an area that is easily monitored but unlikely to be disturbed. The inner forearm or behind the ear are the industry standards for testing. Ensure the skin is clean and free of other products before you begin.
2. Apply the product. Dispense a small amount of the product, roughly the size of a pea, onto the skin. If it is a wash-off product, leave it on for the recommended duration then rinse. If it is a leave-on product, apply as you would on your face.
3. Observe the interim. Allow the product to sit undisturbed for twenty-four hours. Avoid scrubbing or washing the area heavily during this period. Keep the patch dry if possible to maintain the integrity of the test.
4. Check for reactions. After the second day, inspect the area closely in good lighting. Look for subtle shifts in skin tone or texture. Even minor changes indicate the product is not suitable for your current barrier.
5. Document your findings. Record the brand and the name of the product along with the outcome. If the product passed, it is safe to introduce to your routine. If it failed, dispose of the sample or repurpose it for non-sensitive body skin.

A single application on the forearm saves a week of potential recovery.