All hair is technically dead once it grows out of the scalp. However, the question likely refers to testing for damaged or brittle hair, as opposed to healthy hair. We can assess the condition of the hair shaft to determine its health.
Methods to Assess Hair Condition
Several methods can help determine the health of your hair:
1. The Strand Test
This simple test checks the elasticity of your hair.
- How to perform: Gently pull a single strand of hair from near the ends.
- Interpretation: If the strand stretches and snaps back, it indicates some damage. If it breaks easily, the damage is significant. If it stretches and remains stretched, it is very damaged.
This test, referenced in several sources (HairMNL, HairKnowHow), helps assess the elasticity and overall strength of your hair.
2. The "Floppy vs. Stiff" Visual Test
A quick visual assessment can also provide insights.
- How to perform: Take a section of hair and observe its behavior.
- Interpretation: If the hair flops over, it’s generally healthy. If it sticks straight up, it's likely damaged and brittle, according to some sources like TikTok. This visual test is less precise than the strand test.
3. Light Reflection Test
This test assesses the health of the hair cuticle.
- How to perform: Run your fingers through your hair in sunlight. Observe the light reflection.
- Interpretation: A healthy, smooth cuticle reflects light well, creating shine. Dullness indicates potential damage (Eufora International).
Important Considerations
Remember, the hair at the ends is the oldest and most exposed to environmental factors, making it more prone to damage. Testing solely focuses on the condition of the hair shaft, not the follicle's activity. There is no test to determine if a hair follicle is active or dead (RealSelf).
